1.
Maurienne
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Maurienne is one of the provinces of Savoy, corresponding to the arrondissement of Saint-Jean-de-Maurienne in France. It is also the name of the capital of the province. The Maurienne valley is one of the transverse valleys of the Alps. The river which has shaped the valley since the last glaciation is the Arc, the valley begins at the village of Écot, at the foot of the Col de lIseran, and ends at the confluence of the Arc and the Isère in the commune of Aiton. The mountains on the side are the Dauphiné Alps and the Cottian Alps. On the northern side are the part of the Graian Alps known as the Vanoise, the capital, Saint-Jean-de-Maurienne, lies at the confluence of the Arc and the Arvan River. Part of the road and rail route between Lyon and Turin runs through the valley. Numerous ski resorts line the valley, from the villages like Albiez-Montrond to the purpose-built resorts, dating from the 1970s like Le Corbier. The Vanoise National Park and its surroundings are a major tourist attraction. Alpine ibex, grey wolves, lynx, royal eagles or vultures are among the rare species that live in the numerous valleys of Maurienne. The region has numerous traces of habitation since the Paleolithic. In 1032, Humbert the White-Handed received the Maurienne, his land, from Conrad II the Salian whom he had helped in his Italian campaigns against Aribert. The House of Savoy maintained their independence as counts and then dukes until Savoy was linked with the Kingdom of Sardinia, which included Piedmont in north-western Italy. In the Maurienne are a series of five forts, La Barrière de lEsseillon, the Maurienne was not incorporated into France until 1860, as part of the political agreement with Napoleon III that brought about the unification of Italy. Despite this, the Maurienne and the Tarantaise valleys are classified as French towns and lands of Art and it lies along the Italian border around 45 km near Mont Cenis. The principal town is Modane, an old town, at the mouth of the Fréjus Road Tunnel. Much of the Haute-Maurienne is included in the Vanoise National Park and this borders the Gran Paradiso National Park of Italy. The two parks are important areas for ibexes, chamois, and golden eagles, the lammergeier was recently reintroduced into the area and it appears that wolves have reached the region within the past five years
2.
French Alps
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The French Alps are the portions of the Alps mountain range that stand within France, located in the Rhône-Alpes and Provence-Alpes-Côte dAzur regions. While some of the ranges of the French Alps are entirely in France, others, at 4,808 metres, Mont Blanc, on the French-Italian border, is the highest mountain in the Alps, and the highest Western European mountain. Notable towns in the French Alps include Grenoble, Chamonix, Annecy, Chambéry, Évian-les-Bains, the largest connected ski areas are, Les Trois Vallées,338 slopes,600 km of pistes. Portes du Soleil,288 slopes,650 km of slopes not entirely connected, paradiski, Champagny-en-Vanoise,239 slopes,420 km of slopes. Via Lattea,214 slopes,400 km of slopes, Évasion Mont-Blanc,183 slopes,420 km of slopes not entirely connected. Espace Killy,137 slopes,300 km of slopes, grand Massif,134 slopes,265 km of slopes. Les Aravis,133 slopes,220 km of slopes not entirely connected, Les Grandes Rousses,117 slopes,236 km of slopes. Serre Chevalier,111 slopes,250 km of slopes, La Forêt Blanche,104 slopes,180 km of slopes. Les Sybelles,96 slopes,310 km of slopes, valloire and Valmeinier,83 slopes,150 km of slopes. Grand Domaine,82 slopes,150 km of slopes Espace San Bernardo,73 slopes,150 km of slopes, Les Deux Alpes and La Grave,69 slopes,220 km of slopes. The other large ski areas are, Le Val dArly,150 km of slopes, in the winter, these include skiing and snowboarding as well as alternatives such as snowshoeing, sledging. There is a range of activities that happen such as gliding which most happens during the summer months. Summer activities include hiking, mountaineering, biking and rock climbing, roger Frison-Roche, Les montagnes de la terre. Sergio Marazzi, Atlante Orografico delle Alpi, pavone Canavese, Priuli & Verlucca editori. ISBN 978-88-8068-273-8 Sergio Marazzi, La Suddivisione orografica internazionale unificata del Sistema Alpino - article with maps and illustrations, PDF
3.
German language
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German is a West Germanic language that is mainly spoken in Central Europe. It is the most widely spoken and official language in Germany, Austria, Switzerland, South Tyrol, the German-speaking Community of Belgium and it is also one of the three official languages of Luxembourg. Major languages which are most similar to German include other members of the West Germanic language branch, such as Afrikaans, Dutch, English, Luxembourgish and it is the second most widely spoken Germanic language, after English. One of the languages of the world, German is the first language of about 95 million people worldwide. The German speaking countries are ranked fifth in terms of publication of new books. German derives most of its vocabulary from the Germanic branch of the Indo-European language family, a portion of German words are derived from Latin and Greek, and fewer are borrowed from French and English. With slightly different standardized variants, German is a pluricentric language, like English, German is also notable for its broad spectrum of dialects, with many unique varieties existing in Europe and also other parts of the world. The history of the German language begins with the High German consonant shift during the migration period, when Martin Luther translated the Bible, he based his translation primarily on the standard bureaucratic language used in Saxony, also known as Meißner Deutsch. Copies of Luthers Bible featured a long list of glosses for each region that translated words which were unknown in the region into the regional dialect. Roman Catholics initially rejected Luthers translation, and tried to create their own Catholic standard of the German language – the difference in relation to Protestant German was minimal. It was not until the middle of the 18th century that a widely accepted standard was created, until about 1800, standard German was mainly a written language, in urban northern Germany, the local Low German dialects were spoken. Standard German, which was different, was often learned as a foreign language with uncertain pronunciation. Northern German pronunciation was considered the standard in prescriptive pronunciation guides though, however, German was the language of commerce and government in the Habsburg Empire, which encompassed a large area of Central and Eastern Europe. Until the mid-19th century, it was essentially the language of townspeople throughout most of the Empire and its use indicated that the speaker was a merchant or someone from an urban area, regardless of nationality. Some cities, such as Prague and Budapest, were gradually Germanized in the years after their incorporation into the Habsburg domain, others, such as Pozsony, were originally settled during the Habsburg period, and were primarily German at that time. Prague, Budapest and Bratislava as well as cities like Zagreb, the most comprehensive guide to the vocabulary of the German language is found within the Deutsches Wörterbuch. This dictionary was created by the Brothers Grimm and is composed of 16 parts which were issued between 1852 and 1860, in 1872, grammatical and orthographic rules first appeared in the Duden Handbook. In 1901, the 2nd Orthographical Conference ended with a standardization of the German language in its written form
4.
Metamorphic rock
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Metamorphic rocks arise from the transformation of existing rock types, in a process called metamorphism, which means change in form. The original rock is subjected to heat and pressure, causing profound physical and/or chemical change, the protolith may be a sedimentary, an igneous, or even an existing type of metamorphic rock. Metamorphic rocks make up a part of the Earths crust. They are classified by texture and by chemical and mineral assemblage and they may be formed simply by being deep beneath the Earths surface, subjected to high temperatures and the great pressure of the rock layers above it. They can form from tectonic processes such as continental collisions, which cause horizontal pressure and they are also formed when rock is heated up by the intrusion of hot molten rock called magma from the Earths interior. The study of rocks provides information about the temperatures and pressures that occur at great depths within the Earths crust. Some examples of rocks are gneiss, slate, marble, schist. Metamorphic minerals are those that only at the high temperatures and pressures associated with the process of metamorphism. These minerals, known as index minerals, include sillimanite, kyanite, staurolite, andalusite, and some garnet. Other minerals, such as olivines, pyroxenes, amphiboles, micas, feldspars, and quartz, may be found in metamorphic rocks and these minerals formed during the crystallization of igneous rocks. They are stable at temperatures and pressures and may remain chemically unchanged during the metamorphic process. However, all minerals are only within certain limits. The change in the size of the rock during the process of metamorphism is called recrystallization. Both high temperatures and pressures contribute to recrystallization, high temperatures allow the atoms and ions in solid crystals to migrate, thus reorganizing the crystals, while high pressures cause solution of the crystals within the rock at their point of contact. The layering within metamorphic rocks is called foliation, and it occurs when a rock is being shortened along one axis during recrystallization. This causes the platy or elongated crystals of minerals, such as mica and chlorite and this results in a banded, or foliated rock, with the bands showing the colors of the minerals that formed them. Textures are separated into foliated and non-foliated categories, foliated rock is a product of differential stress that deforms the rock in one plane, sometimes creating a plane of cleavage. For example, slate is a metamorphic rock, originating from shale
5.
Quartz
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Quartz is the second most abundant mineral in Earths continental crust, behind feldspar. There are many different varieties of quartz, several of which are semi-precious gemstones, since antiquity, varieties of quartz have been the most commonly used minerals in the making of jewelry and hardstone carvings, especially in Eurasia. The word quartz is derived from the German word Quarz and its Middle High German ancestor twarc, the Ancient Greeks referred to quartz as κρύσταλλος derived from the Ancient Greek κρύος meaning icy cold, because some philosophers apparently believed the mineral to be a form of supercooled ice. Today, the rock crystal is sometimes used as an alternative name for the purest form of quartz. Quartz belongs to the crystal system. The ideal crystal shape is a six-sided prism terminating with six-sided pyramids at each end, well-formed crystals typically form in a bed that has unconstrained growth into a void, usually the crystals are attached at the other end to a matrix and only one termination pyramid is present. However, doubly terminated crystals do occur where they develop freely without attachment, a quartz geode is such a situation where the void is approximately spherical in shape, lined with a bed of crystals pointing inward. α-quartz crystallizes in the crystal system, space group P3121 and P3221 respectively. β-quartz belongs to the system, space group P6222 and P6422. These space groups are truly chiral, both α-quartz and β-quartz are examples of chiral crystal structures composed of achiral building blocks. The transformation between α- and β-quartz only involves a comparatively minor rotation of the tetrahedra with respect to one another, although many of the varietal names historically arose from the color of the mineral, current scientific naming schemes refer primarily to the microstructure of the mineral. Color is an identifier for the cryptocrystalline minerals, although it is a primary identifier for the macrocrystalline varieties. Pure quartz, traditionally called rock crystal or clear quartz, is colorless and transparent or translucent, common colored varieties include citrine, rose quartz, amethyst, smoky quartz, milky quartz, and others. The most important distinction between types of quartz is that of macrocrystalline and the microcrystalline or cryptocrystalline varieties, the cryptocrystalline varieties are either translucent or mostly opaque, while the transparent varieties tend to be macrocrystalline. Chalcedony is a form of silica consisting of fine intergrowths of both quartz, and its monoclinic polymorph moganite. Other opaque gemstone varieties of quartz, or mixed rocks including quartz, often including contrasting bands or patterns of color, are agate, carnelian or sard, onyx, heliotrope, amethyst is a form of quartz that ranges from a bright to dark or dull purple color. The worlds largest deposits of amethysts can be found in Brazil, Mexico, Uruguay, Russia, France, Namibia, sometimes amethyst and citrine are found growing in the same crystal. It is then referred to as ametrine, an amethyst is formed when there is iron in the area where it was formed
6.
Sandstone
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Sandstone is a clastic sedimentary rock composed mainly of sand-sized minerals or rock grains. Most sandstone is composed of quartz or feldspar because these are the most common minerals in the Earths crust, like sand, sandstone may be any color, but the most common colors are tan, brown, yellow, red, grey, pink, white, and black. Since sandstone beds often form highly visible cliffs and other topographic features, quartz-bearing sandstone is converted into quartzite through heating and pressure, usually related to tectonic compression within orogenic belts. They are formed from cemented grains that may either be fragments of a rock or be mono-minerallic crystals. The cements binding these grains together are typically calcite, clays, grain sizes in sands are defined within the range of 0.0625 mm to 2 mm. The formation of sandstone involves two principal stages, first, a layer or layers of sand accumulates as the result of sedimentation, either from water or from air. Typically, sedimentation occurs by the settling out from suspension. The most common cementing materials are silica and calcium carbonate, which are derived either from dissolution or from alteration of the sand after it was buried. Colours will usually be tan or yellow, a predominant additional colourant in the southwestern United States is iron oxide, which imparts reddish tints ranging from pink to dark red, with additional manganese imparting a purplish hue. Red sandstones are seen in the Southwest and West of Britain, as well as central Europe. The regularity of the latter favours use as a source for masonry, either as a building material or as a facing stone. These physical properties allow the grains to survive multiple recycling events. Quartz grains evolve from rock, which are felsic in origin. Feldspathic framework grains are commonly the second most abundant mineral in sandstones, Feldspar can be divided into two smaller subdivisions, alkali feldspars and plagioclase feldspars. The different types of feldspar can be distinguished under a petrographic microscope, below is a description of the different types of feldspar. Alkali feldspar is a group of minerals in which the composition of the mineral can range from KAlSi3O8 to NaAlSi3O8. Plagioclase feldspar is a group of solid solution minerals that range in composition from NaAlSi3O8 to CaAl2Si2O8. Lithic framework grains are pieces of ancient source rock that have yet to weather away to individual mineral grains, accessory minerals are all other mineral grains in a sandstone, commonly these minerals make up just a small percentage of the grains in a sandstone
7.
Orogeny
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An Orogeny is an event that leads to a large structural deformation of the Earths lithosphere due to the interaction between tectonic plates. Orogens or orogenic belts develop when a plate is crumpled and is pushed upwards to form mountain ranges. Orogeny is the mechanism by which mountains are built on continents. The word orogeny comes from Ancient Greek, though it was used before him, the term was employed by the American geologist G. K. Gilbert in 1890 to describe the process of mountain building as distinguished from epeirogeny. Formation of an orogen is accomplished in part by the processes of subduction or convergence of two or more continents. Orogeny usually produces long arcuate structures, known as orogenic belts, generally, orogenic belts consist of long parallel strips of rock exhibiting similar characteristics along the length of the belt. Orogenic belts are associated with zones, which consume crust, produce volcanoes. Geologists attribute the arcuate structure to the rigidity of the descending plate and these island arcs may be added to a continent during an orogenic event. The processes of orogeny can take tens of millions of years, frequently, rock formations that undergo orogeny are severely deformed and undergo metamorphism. Orogenic processes may push deeply buried rocks to the surface, sea-bottom and near-shore material may cover some or all of the orogenic area. If the orogeny is due to two continents colliding, very high mountains can result, an orogenic event may be studied, as a tectonic structural event, as a geographical event, and as a chronological event. The foreland basin forms ahead of the orogen due mainly to loading and resulting flexure of the lithosphere by the mountain belt. The basin migrates with the front and early deposited foreland basin sediments become progressively involved in folding and thrusting. Sediments deposited in the basin are mainly derived from the erosion of the actively uplifting rocks of the mountain range. The fill of many such shows an change in time from deepwater marine through shallow water to continental sediments. Although orogeny involves plate tectonics, the tectonic forces result in a variety of associated phenomena, including magmatism, metamorphism, crustal melting, what exactly happens in a specific orogen depends upon the strength and rheology of the continental lithosphere, and how these properties change during orogenesis. In addition to orogeny, the orogen is subject to other processes, for example, the Caledonian Orogeny refers to the Silurian and Devonian events that resulted from the collision of Laurentia with Eastern Avalonia and other former fragments of Gondwana. The Caledonian Orogen resulted from events and various others that are part of its peculiar orogenic cycle
8.
Metamorphism
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Metamorphism is the change of minerals or geologic texture in pre-existing rocks, without the protolith melting into liquid magma. The change occurs primarily due to heat, pressure, and the introduction of chemically active fluids, the chemical components and crystal structures of the minerals making up the rock may change even though the rock remains a solid. Changes at or just beneath Earths surface due to weathering and/or diagenesis are not classified as metamorphism, Metamorphism typically occurs between diagenesis, and melting. Three types of metamorphism exist, contact, dynamic, and regional, Metamorphism produced with increasing pressure and temperature conditions is known as prograde metamorphism. Conversely, decreasing temperatures and pressure characterize retrograde metamorphism, Metamorphic rocks can change without melting. When pressure is applied, somewhat flattened grains that orient in the same direction have a stable configuration. The upper boundary of metamorphic conditions is related to the onset of melting processes in the rock, the maximum temperature for metamorphism is typically 700 –900 °C, depending on the pressure and on the composition of the rock. Migmatites are rocks formed at this limit, which contain pods. Since the 1980s it has recognized that rocks are rarely dry enough. Conditions producing widespread regionally metamorphosed rocks occur during an orogenic event, the collision of two continental plates or island arcs with continental plates produce the extreme compressional forces required for the metamorphic changes typical of regional metamorphism. These orogenic mountains are eroded, exposing the intensely deformed rocks typical of their cores. The conditions within the slab as it plunges toward the mantle in a subduction zone also produce regional metamorphic effects. The techniques of structural geology are used to unravel the collisional history, regional metamorphism can be described and classified into metamorphic facies or metamorphic zones of temperature/pressure conditions throughout the orogenic terrane. Contact metamorphism occurs typically around intrusive igneous rocks as a result of the increase caused by the intrusion of magma into cooler country rock. The area surrounding the intrusion where the contact metamorphism effects are present is called the metamorphic aureole, contact metamorphic rocks are usually known as hornfels. Rocks formed by contact metamorphism may not present signs of deformation and are often fine-grained. Contact metamorphism is greater adjacent to the intrusion and dissipates with distance from the contact, the size of the aureole depends on the heat of the intrusion, its size, and the temperature difference with the wall rocks. Dikes generally have small aureoles with minimal metamorphism whereas large ultramafic intrusions can have significantly thick, the metamorphic grade of an aureole is measured by the peak metamorphic mineral which forms in the aureole
9.
Zircon
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Zircon is a mineral belonging to the group of nesosilicates. Its chemical name is zirconium silicate and its chemical formula is ZrSiO4. A common empirical formula showing some of the range of substitution in zircon is 1–x4x–y, Zircon forms in silicate melts with large proportions of high field strength incompatible elements. For example, hafnium is almost always present in quantities ranging from 1 to 4%, the crystal structure of zircon is tetragonal crystal system. The natural color of zircon varies between colorless, yellow-golden, red, brown, blue, and green, colorless specimens that show gem quality are a popular substitute for diamond and are also known as Matura diamond. The name derives from the Persian zargun meaning gold-hued and this word is corrupted into jargoon, a term applied to light-colored zircons. The English word zircon is derived from Zirkon, which is the German adaptation of this word, yellow, orange and red zircon is also known as hyacinth, from the flower hyacinthus, whose name is of Ancient Greek origin. Zircon is ubiquitous in the crust of Earth and it occurs as a common accessory mineral in igneous rocks, in metamorphic rocks and as detrital grains in sedimentary rocks. Their average size in granite rocks is about 0. 1–0.3 mm, Zircon is also very resistant to heat and corrosion. Because of their uranium and thorium content, some zircons undergo metamictization, connected to internal radiation damage, these processes partially disrupt the crystal structure and partly explain the highly variable properties of zircon. As zircon becomes more and more modified by internal radiation damage, the density decreases, the structure is compromised. Zircon occurs in many colors, including brown, yellow, green, blue, gray. The color of zircons can sometimes be changed by heat treatment, common brown zircons can be transformed into colorless and blue zircons by heating to 800 to 1000 °C. In geological settings, the development of pink, red, and purple zircon occurs after hundreds of millions of years, color in this red or pink series is annealed in geological conditions above the temperature about 350 °C. Zircon is mainly consumed as an opacifier, and has known to be used in the decorative ceramics industry. Zircon is one of the key used by geologists for geochronology. Zircon is a part of the ZTR index to classify highly-weathered sediments, Zircon is a common accessory to trace mineral constituent of most granite and felsic igneous rocks. Due to its hardness, durability and chemical inertness, zircon persists in sedimentary deposits and is a constituent of most sands
10.
Rutile
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Rutile is a mineral composed primarily of titanium dioxide, TiO2. Rutile is the most common form of TiO2. Three rarer polymorphs of TiO2 are known, Anatase, a metastable tetragonal mineral of pseudo-octahedral habit Brookite, an orthorhombic mineral TiO2, rutile has among the highest refractive indices at visible wavelengths of any known crystal, and also exhibits a particularly large birefringence and high dispersion. Owing to these properties, it is useful for the manufacture of optical elements, especially polarization optics, for longer visible. Natural rutile may contain up to 10% iron and significant amounts of niobium and tantalum, rutile derives its name from the Latin rutilus, red, in reference to the deep red color observed in some specimens when viewed by transmitted light. Rutile is an accessory mineral in high-temperature and high-pressure metamorphic rocks. Thermodynamically, rutile is the most stable polymorph of TiO2 at all temperatures, consequently, the transformation of the metastable TiO2 polymorphs to rutile is irreversible. As it has the lowest molecular volume of the three polymorphs, it is generally the primary titanium bearing phase in most high-pressure metamorphic rocks. The occurrence of large specimen crystals is most common in pegmatites, skarns, rutile is found as an accessory mineral in some altered igneous rocks, and in certain gneisses and schists. In groups of acicular crystals it is frequently seen penetrating quartz as in the fléches damour from Graubünden, in 2005 the Republic of Sierra Leone in West Africa had a production capacity of 23% of the worlds annual rutile supply, which rose to approximately 30% in 2008. The reserves, lasting for about 19 years, are estimated at 259,000,000 metric tons, rutile has a body-centred tetragonal unit cell, with unit cell parameters a=b=4.584 Å, and c=2.953 Å. The titanium cations have a number of 6 meaning they are surrounded by an octahedron of 6 oxygen atoms. The oxygen anions have a number of 3 resulting in a trigonal planar co-ordination. Rutile also shows a screw axis when its octahedra are viewed sequentially, rutile crystals are most commonly observed to exhibit a prsimatic or acicular growth habit with preferential orientation along their c-axis, the direction. This growth habit is favored as the facets of rutile exhibit the lowest surface free energy and are therefore thermodynamically most stable, the c-axis oriented growth of rutile appears clearly in nanorods, nanowires and Abnormal grain growth phenomena of this phase. In large enough quantities in beach sands, rutile forms an important constituent of heavy minerals, miners extract and separate the valuable minerals—e. g. The main uses for rutile are the manufacture of ceramic, as a pigment. Finely powdered rutile is a brilliant white pigment and is used in paints, plastics, paper, foods, titanium dioxide pigment is the single greatest use of titanium worldwide
11.
Magnetite
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Magnetite is a mineral and one of the main iron ores. With the chemical formula Fe3O4, it is one of the oxides of iron, Magnetite is ferrimagnetic, it is attracted to a magnet and can be magnetized to become a permanent magnet itself. It is the most magnetic of all the minerals on Earth. Naturally-magnetized pieces of magnetite, called lodestone, will attract small pieces of iron, today it is mined as iron ore. Small grains of magnetite occur in almost all igneous and metamorphic rocks, Magnetite is black or brownish-black with a metallic luster, has a Mohs hardness of 5–6 and leaves a black streak. The chemical IUPAC name is iron oxide and the chemical name is ferrous-ferric oxide. In addition to rocks, magnetite also occurs in sedimentary rocks, including banded iron formations and in lake. Magnetite nanoparticles are also thought to form in soils, where they probably oxidize rapidly to maghemite, Magnetite has an inverse spinel crystal structure. As a member of the group, it can form solid solutions with similarly structured minerals, including ulvospinel. Titanomagnetite, also known as titaniferous magnetite, is a solution between magnetite and ulvospinel that crystallizes in many mafic igneous rocks. Titanomagnetite may undergo oxyexsolution during cooling, resulting in ingrowths of magnetite and ilmenite, Magnetite has been important in understanding the conditions under which rocks form. Magnetite reacts with oxygen to produce hematite, and the pair forms a buffer that can control oxygen fugacity. Commonly, igneous rocks contain solid solutions of both titanomagnetite and hemoilmenite or titanohematite, Magnetite also is produced from peridotites and dunites by serpentinization. Lodestones were used as a form of magnetic compass. At low temperatures, magnetite undergoes a crystal structure phase transition from a structure to a cubic structure known as the Verwey transition. The Verwey transition occurs around 121 K and is dependent on size, domain state. An isotropic point also occurs near the Verwey transition around 130 K, the Curie temperature of magnetite is 858 K. Magnetite is sometimes found in large quantities in beach sand. Such black sands are found in places, such as Lung Kwu Tan of Hong Kong, California of the United States
12.
Fossil
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Fossils are the preserved remains or traces of animals, plants, and other organisms from the remote past. The totality of fossils, both discovered and undiscovered, and their placement in fossiliferous rock formations and sedimentary layers is known as the fossil record. The study of fossils across geological time, how they were formed, such a preserved specimen is called a fossil if it is older than some minimum age, most often the arbitrary date of 10,000 years. The observation that fossils were associated with certain rock strata led early geologists to recognize a geological timescale in the 19th century. The development of dating techniques in the early 20th century allowed geologists to determine the numerical or absolute age of the various strata. Like extant organisms, fossils vary in size from microscopic, even single bacterial cells one micrometer in diameter, to gigantic, such as dinosaurs, Fossils may also consist of the marks left behind by the organism while it was alive, such as animal tracks or feces. These types of fossil are called trace fossils, as opposed to body fossils, finally, past life leaves some markers that cannot be seen but can be detected in the form of biochemical signals, these are known as chemofossils or biosignatures. The process of fossilization varies according to type and external conditions. Permineralization is a process of fossilization that occurs when an organism is buried, the empty spaces within an organism become filled with mineral-rich groundwater. Minerals precipitate from the groundwater, occupying the empty spaces and this process can occur in very small spaces, such as within the cell wall of a plant cell. Small scale permineralization can produce very detailed fossils, for permineralization to occur, the organism must become covered by sediment soon after death or soon after the initial decay process. The degree to which the remains are decayed when covered determines the later details of the fossil, some fossils consist only of skeletal remains or teeth, other fossils contain traces of skin, feathers or even soft tissues. This is a form of diagenesis, in some cases the original remains of the organism completely dissolve or are otherwise destroyed. The remaining organism-shaped hole in the rock is called an external mold, if this hole is later filled with other minerals, it is a cast. An endocast or internal mold is formed when sediments or minerals fill the cavity of an organism. This is a form of cast and mold formation. If the chemistry is right, the organism can act as a nucleus for the precipitation of minerals such as siderite, if this happens rapidly before significant decay to the organic tissue, very fine three-dimensional morphological detail can be preserved. Nodules from the Carboniferous Mazon Creek fossil beds of Illinois, USA, are among the best documented examples of such mineralization, replacement occurs when the shell, bone or other tissue is replaced with another mineral
13.
Sedimentary
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Sedimentary rocks are types of rock that are formed by the deposition and subsequent cementation of that material at the Earths surface and within bodies of water. Sedimentation is the name for processes that cause mineral and/or organic particles to settle in place. The particles that form a rock by accumulating are called sediment. Sedimentation may also occur as minerals precipitate from solution or shells of aquatic creatures settle out of suspension. The sedimentary rock cover of the continents of the Earths crust is extensive, sedimentary rocks are only a thin veneer over a crust consisting mainly of igneous and metamorphic rocks. Sedimentary rocks are deposited in layers as strata, forming a structure called bedding, sedimentary rocks are also important sources of natural resources like coal, fossil fuels, drinking water or ores. The study of the sequence of rock strata is the main source for an understanding of the Earths history, including palaeogeography, paleoclimatology. The scientific discipline that studies the properties and origin of rocks is called sedimentology. Sedimentology is part of both geology and physical geography and overlaps partly with other disciplines in the Earth sciences, such as pedology, geomorphology, geochemistry, sedimentary rocks have also been found on Mars. Clastic sedimentary rocks are composed of rock fragments that were cemented by silicate minerals. Clastic rocks are composed largely of quartz, feldspar, rock fragments, clay minerals, and mica, any type of mineral may be present, clastic sedimentary rocks, are subdivided according to the dominant particle size. Most geologists use the Udden-Wentworth grain size scale and divide unconsolidated sediment into three fractions, gravel, sand, and mud and this tripartite subdivision is mirrored by the broad categories of rudites, arenites, and lutites, respectively, in older literature. The subdivision of these three categories is based on differences in clast shape, conglomerates and breccias), composition. Conglomerates are dominantly composed of rounded gravel, while breccias are composed of dominantly angular gravel, composition of framework grains The relative abundance of sand-sized framework grains determines the first word in a sandstone name. Naming depends on the dominance of the three most abundant components quartz, feldspar, or the lithic fragments that originated from other rocks, all other minerals are considered accessories and not used in the naming of the rock, regardless of abundance. Clean sandstones with open space are called arenites. Muddy sandstones with abundant muddy matrix are called wackes, six sandstone names are possible using the descriptors for grain composition and the amount of matrix. Mudrocks are sedimentary rocks composed of at least 50% silt- and clay-sized particles and these relatively fine-grained particles are commonly transported by turbulent flow in water or air, and deposited as the flow calms and the particles settle out of suspension
14.
Quartz arenite
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A quartz arenite or quartzarenite is a sandstone composed of greater than 90% detrital quartz, with limited amounts of other framework grains and matrix. It can have higher-than-average amounts of resistant grains, like chert, the term quartz arenite is derived from the main component and arenite, a Latin term for a rock with sand-sized grains. The term quartzose sandstone can also be used for a quartz arenite, quartz arenites are the most mature sedimentary rocks possible, and are often referred to as ultra- or super-mature, and are usually cemented by silica. They often exhibit both textural and compositional maturity, most of the time, these sediments are reworked over and over, even being eroded out of a lithified rock and becoming a brand new sediment and rock. This is known as a multicycle sand
15.
Weathering
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Weathering is the breaking down of rocks, soil, and minerals as well as wood and artificial materials through contact with the Earths atmosphere, waters, and biological organisms. Two important classifications of weathering processes exist – physical and chemical weathering, mechanical or physical weathering involves the breakdown of rocks and soils through direct contact with atmospheric conditions, such as heat, water, ice and pressure. While physical weathering is accentuated in very cold or very dry environments, chemical reactions are most intense where the climate is wet, however, both types of weathering occur together, and each tends to accelerate the other. For example, physical abrasion decreases the size of particles and therefore increases their surface area, the various agents act in concert to convert primary minerals to secondary minerals and release plant nutrient elements in soluble forms. The materials left over after the rock breaks down combined with organic material creates soil, in addition, many of Earths landforms and landscapes are the result of weathering processes combined with erosion and re-deposition. Physical weathering, also recognized as mechanical weathering, is the class of processes that causes the disintegration of rocks without chemical change, the primary process in physical weathering is abrasion. However, chemical and physical weathering often go hand in hand, physical weathering can occur due to temperature, pressure, frost etc. For example, cracks exploited by physical weathering will increase the area exposed to chemical action. Abrasion by water, ice, and wind loaded with sediment can have tremendous cutting power, as is amply demonstrated by the gorges, ravines. In glacial areas, huge moving ice masses embedded with soil and rock fragments grind down rocks in their path, plant roots sometimes enter cracks in rocks and pry them apart, resulting in some disintegration, Burrowing animals may help disintegrate rock through their physical action. However, such influences are usually of importance in producing parent material when compared to the drastic physical effects of water, ice, wind. Physical weathering is called mechanical weathering or disaggregation. Thermal stress weathering results from the expansion and contraction of rock, for example, heating of rocks by sunlight or fires can cause expansion of their constituent minerals. As some minerals expand more than others, temperature changes set up differential stresses that cause the rock to crack apart. Because the outer surface of a rock is often warmer or colder than the more protected inner portions and this process may be sharply accelerated if ice forms in the surface cracks. When water freezes, it expands with a force of about 1465 Mg/m^2, disintegrating huge rock masses, thermal stress weathering comprises two main types, thermal shock and thermal fatigue. Thermal stress weathering is an important mechanism in deserts, where there is a diurnal temperature range, hot in the day. The repeated heating and cooling exerts stress on the layers of rocks
16.
Soil
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Soil is a mixture of minerals, organic matter, gases, liquids, and countless organisms that together support life on Earth. Soil is called the Skin of the Earth and interfaces with the lithosphere, the hydrosphere, the atmosphere, the term pedolith, used commonly to refer to the soil, literally translates ground stone. Soil consists of a phase of minerals and organic matter, as well as a porous phase that holds gases. Accordingly, soils are often treated as a system of solids, liquids. Soil is a product of the influence of climate, relief, organisms, Soil continually undergoes development by way of numerous physical, chemical and biological processes, which include weathering with associated erosion. Given its complexity and strong internal connectedness soil has been considered as an ecosystem by soil ecologists. Most soils have a dry bulk density between 1.1 and 1.6 g/cm3, while the particle density is much higher. Little of the soil of planet Earth is older than the Pleistocene and none is older than the Cenozoic, Soil science has two basic branches of study, edaphology and pedology. Edaphology is concerned with the influence of soils on living things, pedology is focused on the formation, description, and classification of soils in their natural environment. In engineering terms, soil is referred to as regolith, or loose material that lies above the solid geology. Soil is commonly referred to as earth or dirt, technically, as soil resources serve as a basis for food security, the international community advocates its sustainable and responsible use through different types of soil governance. Soil is a component of the Earths ecosystem. The worlds ecosystems are impacted in far-reaching ways by the carried out in the soil, from ozone depletion and global warming, to rainforest destruction. Following the atmosphere, the soil is the next largest carbon reservoir on Earth, as the planet warms, soils will add carbon dioxide to the atmosphere due to its increased biological activity at higher temperatures. Thus, soil carbon losses likely have a positive feedback response to global warming. Since soil has a range of available niches and habitats. A gram of soil can contain billions of organisms, belonging to thousands of species, mostly microbial, Soil has a mean prokaryotic density of roughly 108 organisms per gram, whereas the ocean has no more than 107 procaryotic organisms per milliliter of seawater. Since plant roots need oxygen, ventilation is an important characteristic of soil and this ventilation can be accomplished via networks of interconnected soil pores, which also absorb and hold rainwater making it readily available for plant uptake
17.
Kakwa Provincial Park and Protected Area
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Kakwa Provincial Park and Protected Area is a 170,890 ha provincial park in northeastern British Columbia, Canada. There are significant amounts of fish fossils there, the tallest mountains are Mount Sir Alexander and Mount Ida. Fishing in Kakwa Lake is permitted, snowmobiling is permitted on trails, meadows, and along mountain sides. The Kakwa River originates in Kakwa Lake, at the core of the park and it is named for Kakwa, the Cree word for porcupine. List of British Columbia Provincial Parks British Columbia, dawson Creek Land & Resource Management Plan, p.44
18.
Hand axe
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A hand axe is a prehistoric stone tool with two faces that is the longest-used tool in human history. It is usually made from flint or chert and it is characteristic of the lower Acheulean and middle Palaeolithic periods. Its technical name comes from the fact that the model is a generally bifacial Lithic flake with an almond-shaped shape. Hand axes tend to be symmetrical along their axis and formed by pressure or percussion. The most common hand axes have an end and rounded base, which gives them their characteristic shape. Hand axes are a type of the somewhat wider biface group of two-faced tools or weapons, Hand axes were the first prehistoric tools to be recognized as such, the first published representation of a hand axe was drawn by John Frere and appeared in a British publication in 1800. Until that time, their origins were thought to be natural or supernatural and they were called thunderstones, because popular tradition held that they had fallen from the sky during storms or were formed inside the earth by a lightning strike and then appeared at the surface. They are used in rural areas as an amulet to protect against storms. Hand axe tools were used to butcher animals, to dig for tubers, animals and water, to chop wood and remove tree bark, to throw at prey. Four classes of hand axe are,1, Large, thick hand axes reduced from cores or thick flakes, referred to as blanks 2, French antiquarian André Vayson de Pradenne introduced the word biface in 1920. The expression faustkeil is used in German and it can be literally translated as hand axe, although in a stricter sense it means fist wedge. It is the same in Dutch where the expression used is vuistbijl which literally means fist axe, the same locution occurs in other languages. However, the impression of these tools were based on ideal pieces that were of such perfect shape that they caught the attention of non-experts. Their typology broadened the terms meaning, biface hand axe and bifacial lithic items are distinguished. A hand axe need not be an item and many bifacial items are not hand axes. Nor were hand axes and bifacial items exclusive to the Lower Palaeolithic period in the Old World and they appear throughout the world and in many different pre-historical epochs, without necessarily implying an ancient origin. Lithic typology is not a chronological reference and was abandoned as a dating system. The word biface refers to something different in English than biface in French or bifaz in Spanish, bifacially carved cutting tools, similar to hand axes, were used to clear scrub vegetation throughout the Neolithic and Chalcolithic periods
19.
Stellenbosch
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Stellenbosch is a town in the Western Cape province of South Africa, situated about 50 kilometres east of Cape Town, along the banks of the Eerste River. It is the second oldest European settlement in the province, after Cape Town, Stellenbosch has its own municipality, adjoining the metropolitan area of the City of Cape Town. The town is home to Stellenbosch University, technopark is a modern science park situated on the southern side of the town near the Stellenbosch Golf Course. In 1899 Louis Péringuey discovered Paleolithic stone tools of the Acheulean type at a site named Bosmans Crossing near the Adam Tas Bridge at the entrance to Stellenbosch. The town was founded in 1679 by the Governor of the Cape Colony, Simon van der Stel, the town grew so quickly that it became an independent local authority in 1682 and the seat of a magistrate with jurisdiction over 25,000 square kilometers in 1685. Early visitors commented on the oak trees and gardens, during 1690 some Huguenot refugees settled in Stellenbosch, grapes were planted in the fertile valleys around Stellenbosch and soon it became the centre of the South African wine industry. In 1710 a fire destroyed most of the town, including the first church, all the Company property, only two or three houses were left standing. When the church was rebuilt in 1723 it was located on what was then the outskirts of the town and this church was enlarged a number of times since 1723 and is currently known as the Moederkerk. The first school had opened in 1683, but education in the town began in earnest in 1859 with the opening of a seminary for the Dutch Reformed Church. Rhenish Girls High School, established in 1860, is the oldest school for girls in South Africa, a gymnasium, known as het Stellenbossche Gymnasium, was established in 1866. In 1874 some higher classes became Victoria College and then in 1918 University of Stellenbosch, the first mens hostel to be established in Stellenbosch was Wilgenhof, in 1903. In 1905 the first womens hostel to be established in Stellenbosch was Harmonie, Harmonie and Wilgenhof were part of the Victoria College. In 1909 an old boy of the school, Paul Roos, on his retirement the schools name was changed to Paul Roos Gymnasium. Stellenbosch had a population of around 155,733 in 2011. This estimate is based on formally housed residents, as such it is almost certainly understated, as the Stellenbosch region also includes a number of informal settlements. The population of Stellenbosch is primarily Afrikaans speaking, with English, the black population mostly speaks Xhosa as their home language, with whites speaking Afrikaans or English, the coloured is primarily Afrikaans speaking and are in the majority. In 1833 the population for the Stellenbosch District was 16,137 and this comprised 8,555 slaves,6,066 Whites,1,220 Hottentots, and 296 Free Blacks. Stellenbosch is 53 km east of Cape Town via National Route N1, Stellenbosch is in a hilly region of the Cape Winelands, and is sheltered in a valley at an average elevation of 136 m, flanked on the west by Papegaaiberg, which is actually a hill
20.
Track ballast
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Track ballast forms the trackbed upon which railroad ties are laid. It is packed between, below, and around the ties and it is used to bear the load from the railroad ties, to facilitate drainage of water, and also to keep down vegetation that might interfere with the track structure. This also serves to hold the track in place as the roll by. It is typically made of crushed stone, although ballast has sometimes consisted of other, less suitable materials, the term ballast comes from a nautical term for the stones used to stabilize a ship. The appropriate thickness of a layer of track ballast depends on the size and spacing of the ties, the amount of traffic on the line, and various other factors. Track ballast should never be laid down less than 150 mm thick, an insufficient depth of ballast causes overloading of the underlying soil, and in unfavourable conditions overloading the soil causes the track to sink, usually unevenly. Ballast less than 300 mm thick can lead to vibrations that damage nearby structures, however, increasing the depth beyond 300 mm adds no extra benefit in reducing vibration. In turn, track ballast typically rests on a layer of crushed stones. The sub-ballast layer gives a solid support for the top ballast, sometimes an elastic mat is placed on the layer of sub-ballast and beneath the ballast, thereby significantly reducing vibration. The ballast shoulder always should be at least 150 mm wide, the shape of the ballast is also important. Stones must be cut, with sharp edges, so that they properly interlock and grip the ties in order to fully secure them against movement. In order to let the stones fully settle and interlock, speed limits are often lowered on sections of track for a period of time after new ballast has been laid. If ballast is badly fouled, the clogging will reduce its ability to drain properly, therefore, keeping the ballast clean is essential. Bioremediation can be used to clean ballast and it is not always necessary to replace the ballast if it is fouled, nor must all the ballast be removed if it is to be cleaned. Removing and cleaning the ballast from the shoulder is often sufficient, such machines can clean up to two kilometres of ballast in an hour. In such cases, it is necessary to replace the ballast altogether, the dump and jack method cannot of course be used through tunnels, under overbridges, and where there are platforms. Where the track is laid over a swamp, such as the Hexham swamp in Australia, the ballast continuously sinks, after 150 years of topping up, there appears to be 10 m of sunken ballast under the tracks. Chat Moss in the United Kingdom is similar, regular inspection of the ballast shoulder is important, as noted earlier, the lateral stability of the track depends upon the shoulder
21.
Ferrosilicon
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Ferrosilicon is a ferroalloy, an alloy of iron and silicon with an average silicon content between 15 and 90 weight percent. It contains a proportion of iron silicides. Ferrosilicon is produced by reduction of silica or sand with coke in the presence of iron, typical sources of iron are scrap iron, millscale. Ferrosilicons with silicon content up to about 15% are made in blast furnaces lined with acid fire bricks, ferrosilicons with higher silicon content are made in electric arc furnaces. The usual formulations on the market are ferrosilicons with 15%, 45%, 75%, the remainder is iron, with about 2% consisting of other elements like aluminium and calcium. An overabundance of silica is used to prevent formation of silicon carbide, a mineral perryite is similar to ferrosilicon, with its composition Fe5Si2. In contact with water, ferrosilicon may slowly produce hydrogen, the reaction, which is accelerated in the presence of base, is used for hydrogen production. The melting point and density of ferrosilicon depends on its silicon content, ferrosilicon is used as a source of silicon to reduce metals from their oxides and to deoxidize steel and other ferrous alloys. This prevents the loss of carbon from the steel, ferromanganese, spiegeleisen, silicides of calcium. It can be used to make other ferroalloys, ferrosilicon is also used for manufacture of silicon, corrosion-resistant and high-temperature resistant ferrous silicon alloys, and silicon steel for electromotors and transformer cores. In the manufacture of cast iron, ferrosilicon is used for inoculation of the iron to accelerate graphitization, in arc welding, ferrosilicon can be found in some electrode coatings. Ferrosilicon is a basis for manufacture of prealloys like magnesium ferrosilicon, mgFeSi contains 3–42% magnesium and small amounts of rare earth metals. Ferrosilicon is also important as an additive to cast irons for controlling the content of silicon. Magnesium ferrosilicon is instrumental in the formation of nodules, which give ductile iron its flexible property, unlike gray cast iron, which forms graphite flakes, ductile iron contains graphite nodules, or pores, which make cracking more difficult. Ferrosilicon is also used in the Pidgeon process to make magnesium from dolomite, treatment of high-silicon ferrosilicon with hydrogen chloride is the basis of the industrial synthesis of trichlorosilane. Ferrosilicon is used by the military to produce hydrogen for balloons by the ferrosilicon method. The chemical reaction uses sodium hydroxide, ferrosilicon, and water, the generator is small enough to fit in a truck and requires only a small amount of electric power, the materials are stable and not combustible, and they do not generate hydrogen until mixed. The method has been in use since World War I, jorgenson, John D. Corathers, Lisa A. Gambogi, Joseph, Kuck, Peter H. Magyar, Michael J. Papp, John F. Shedd, Kim B
22.
Silicon
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Silicon is a chemical element with symbol Si and atomic number 14. A hard and brittle crystalline solid with a metallic luster. It is a member of group 14 in the table, along with carbon above it and germanium, tin, lead. It is not very reactive, although more reactive than germanium, Silicon is the eighth most common element in the universe by mass, but very rarely occurs as the pure element in the Earths crust. It is most widely distributed in dusts, sands, planetoids, over 90% of the Earths crust is composed of silicate minerals, making silicon the second most abundant element in the Earths crust after oxygen. Most silicon is used commercially without being separated, and often with little processing of the natural minerals, such use includes industrial construction with clays, silica sand, and stone. Silicate is used in Portland cement for mortar and stucco, and mixed with sand and gravel to make concrete for walkways, foundations. Silicates are used in whiteware ceramics such as porcelain, and in traditional quartz-based soda-lime glass, Silicon compounds such as silicon carbide are used as abrasives and components of high-strength ceramics. Elemental silicon also has an impact on the modern world economy. Most free silicon is used in the refining, aluminium-casting. Silicon is the basis of the widely used synthetic polymers called silicones, Silicon is an essential element in biology, although only tiny traces are required by animals. However, various sea sponges and microorganisms, such as diatoms and radiolaria, silica is deposited in many plant tissues, such as in the bark and wood of Chrysobalanaceae and the silica cells and silicified trichomes of Cannabis sativa, horsetails and many grasses. Silicon is a solid at room temperature, with a point of 1,414 °C. Like water, it has a density in a liquid state than in a solid state and it expands when it freezes. With a relatively high conductivity of 149 W·m−1·K−1, silicon conducts heat well. In its crystalline form, pure silicon has a gray color, like germanium, silicon is rather strong, very brittle, and prone to chipping. Silicon, like carbon and germanium, crystallizes in a cubic crystal structure with a lattice spacing of 0.5430710 nm. The outer electron orbital of silicon, like that of carbon, has four valence electrons, the 1s, 2s, 2p and 3s subshells are completely filled while the 3p subshell contains two electrons out of a possible six
23.
Paleolithic
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It extends from the earliest known use of stone tools, probably by Homo habilis initially,2.6 million years ago, to the end of the Pleistocene around 10,000 BP. The Paleolithic era is followed by the Mesolithic, the date of the Paleolithic–Mesolithic boundary may vary by locality as much as several thousand years. During the Paleolithic period, humans grouped together in small societies such as bands, the Paleolithic is characterized by the use of knapped stone tools, although at the time humans also used wood and bone tools. Other organic commodities were adapted for use as tools, including leather and vegetable fibers, however, due to their nature, surviving artifacts of the Paleolithic era are known as paleoliths. About 50,000 years ago, there was a increase in the diversity of artifacts. For the first time in Africa, bone artifacts and the first art appear in the archaeological record, the first evidence of human fishing is also noted, from artifacts in places such as Blombos cave in South Africa. The new technology generated an explosion of modern humans which is believed to have led to the extinction of the Neanderthals. Humankind gradually evolved from members of the genus Homo—such as Homo habilis. The climate during the Paleolithic consisted of a set of glacial and interglacial periods in which the climate periodically fluctuated between warm and cool temperatures, by c. 50,000 – c. 40,000 BP, the first humans set foot in Australia. By c. 45,000 BP, humans lived at 61°N latitude in Europe, by c. 30,000 BP, Japan was reached, and by c. 27,000 BP humans were present in Siberia, above the Arctic Circle. At the end of the Upper Paleolithic, a group of humans crossed Beringia, the term Paleolithic was coined by archaeologist John Lubbock in 1865. It derives from Greek, παλαιός, palaios, old, and λίθος, lithos, stone, human evolution is the part of biological evolution concerning the emergence of anatomically modern humans as a distinct species. The Paleolithic Period coincides almost exactly with the Pleistocene epoch of geologic time and this epoch experienced important geographic and climatic changes that affected human societies. During the preceding Pliocene, continents had continued to drift from possibly as far as 250 km from their present locations to positions only 70 km from their current location. South America became linked to North America through the Isthmus of Panama, most of Central America formed during the Pliocene to connect the continents of North and South America, allowing fauna from these continents to leave their native habitats and colonize new areas. Africas collision with Asia created the Mediterranean Sea, cutting off the remnants of the Tethys Ocean, climates during the Pliocene became cooler and drier, and seasonal, similar to modern climates. The formation of an Arctic ice cap around 3 million years ago is signaled by a shift in oxygen isotope ratios and ice-rafted cobbles in the North Atlantic. Mid-latitude glaciation probably began before the end of the epoch, the global cooling that occurred during the Pliocene may have spurred on the disappearance of forests and the spread of grasslands and savannas
24.
Flint
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Flint is a hard, sedimentary cryptocrystalline form of the mineral quartz, categorized as a variety of chert. It occurs chiefly as nodules and masses in sedimentary rocks, such as chalks, inside the nodule, flint is usually dark grey, black, green, white or brown in colour, and often has a glassy or waxy appearance. A thin layer on the outside of the nodules is usually different in colour, typically white, from a petrological point of view, flint refers specifically to the form of chert which occurs in chalk or marly limestone. Similarly, common chert occurs in limestone, the exact mode of formation of flint is not yet clear but it is thought that it occurs as a result of chemical changes in compressed sedimentary rock formations, during the process of diagenesis. One hypothesis is that a gelatinous material fills cavities in the sediment, such as bored by crustaceans or molluscs. This hypothesis certainly explains the shapes of flint nodules that are found. The source of dissolved silica in the media could be the spicules of silicious sponges. Certain types of flint, such as that from the south coast of England, pieces of coral and vegetation have been found preserved like amber inside the flint. Thin slices of the stone often reveal this effect, puzzling giant flint formations known as paramoudra and flint circles are found around Europe but especially in Norfolk, England on the beaches at Beeston Bump and West Runton. Flint sometimes occurs in large flint fields in Jurassic or Cretaceous beds, flint was used in the manufacture of tools during the Stone Age as it splits into thin, sharp splinters called flakes or blades when struck by another hard object. This process is referred to as knapping, flint mining is attested since the Palaeolithic, but became more common since the Neolithic. When struck against steel, a flint edge will produce sparks, the hard flint edge shaves off a particle of the steel that exposes iron which reacts with oxygen from the atmosphere and can ignite the proper tinder. Prior to the availability of steel, rocks of pyrite would be used along with the flint. These methods are popular in woodcraft, bushcraft, and among those who wish to use traditional skills, a later, major use of flint and steel was in the flintlock mechanism, used primarily in flintlock firearms, but also used on dedicated fire-starting tools. The sparks ignite the powder and that flame, in turn, ignites the main charge, propelling the ball, bullet. While the military use of the flintlock declined after the adoption of the cap from the 1840s onward, flintlock rifles. Flint and steel used to strike sparks were superseded by ferrocerium and this man-made material, when scraped with any hard, sharp edge, produces sparks that are much hotter than obtained with natural flint and steel, allowing use of a wider range of tinders. Because it can produce sparks when wet and can start fires when used correctly, ferrocerium is used in many cigarette lighters, where it is referred to as flint
25.
Stone tool
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A stone tool is, in the most general sense, any tool made either partially or entirely out of stone. Although stone tool-dependent societies and cultures still exist today, most stone tools are associated with prehistoric, archaeologists often study such prehistoric societies, and refer to the study of stone tools as lithic analysis. Ethnoarchaeology has been a research field in order to further the understanding and cultural implications of stone tool use. Stone has been used to make a variety of different tools throughout history, including arrow heads, spearpoints. Stone tools may be made of ground stone or chipped stone. Chipped stone tools are made from materials such as chert or flint, radiolarite, chalcedony, obsidian, basalt. One simple form of reduction is to strike stone flakes from a nucleus of material using a hammerstone or similar hard hammer fabricator, if the goal of the reduction strategy is to produce flakes, the remnant lithic core may be discarded once it has become too small to use. In some strategies, however, a flintknapper reduces the core to a rough unifacial or bifacial preform, more complex forms of reduction include the production of highly standardized blades, which can then be fashioned into a variety of tools such as scrapers, knives, sickles and microliths. Archaeologists classify stone tools into industries that share distinctive technological or morphological characteristics and he assigned to them relative dates, Modes 1 and 2 to the Lower Palaeolithic,3 to the Middle Palaeolithic,4 to the Advanced and 5 to the Mesolithic. They were not to be conceived, however, as either universal—that is, they did not account for all lithic technology, Mode 1, for example, was in use in Europe long after it had been replaced by Mode 2 in Africa. Clarkes scheme was adopted enthusiastically by the archaeological community, one of its advantages was the simplicity of terminology, for example, the Mode 1 / Mode 2 Transition. The transitions are currently of greatest interest, Kenya Stone tools found from 2011 to 2014 at Lake Turkana in Kenya, are dated to be 3.3 million years old, and predate the genus Homo by half million years. The oldest known Homo fossil is 2.8 million years old compared to the 3.3 million year old stone tools. Dating of the tools was by dating volcanic ash layers in which the tools were found, Oldowan tools were characterised by their simple construction, predominantly using core forms. The blunt end is the surface, the sharp, the distal. Grasping the proximal surface, the hominid brought the surface down hard on an object he wished to detach or shatter. The earliest known Oldowan tools yet found date from 2.6 million years ago, during the Lower Palaeolithic period, and have been uncovered at Gona in Ethiopia. Homo habilis was the hominin who used the tools for most of the Oldowan in Africa, eventually, more complex, Mode 2 tools began to be developed through the Acheulean Industry, named after the site of Saint-Acheul in France
26.
South Dakota
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South Dakota is a state located in the Midwestern region of the United States. It is named after the Lakota and Dakota Sioux Native American tribes, South Dakota is the 17th most expansive, but the 5th least populous and the 5th least densely populated of the 50 United States. Once the southern portion of the Dakota Territory, South Dakota became a state on November 2,1889, Pierre is the state capital and Sioux Falls, with a population of about 171,000, is South Dakotas largest city. South Dakota is bordered by the states of North Dakota, Minnesota, Iowa, Nebraska, Wyoming, the state is bisected by the Missouri River, dividing South Dakota into two geographically and socially distinct halves, known to residents as East River and West River. Eastern South Dakota is home to most of the states population, West of the Missouri, ranching is the predominant agricultural activity, and the economy is more dependent on tourism and defense spending. Most of the Native American reservations are located in West River, the Black Hills, a group of low pine-covered mountains sacred to the Sioux, are located in the southwest part of the state. Mount Rushmore, a major tourist destination, is located there, South Dakota experiences a temperate continental climate, with four distinct seasons and precipitation ranging from moderate in the east to semi-arid in the west. The ecology of the state features species typical of a North American grassland biome, humans have inhabited the area for several millennia, with the Sioux becoming dominant by the early 19th century. In the late 19th century, European-American settlement intensified after a rush in the Black Hills. Encroaching miners and settlers triggered a number of Indian wars, ending with the Wounded Knee Massacre in 1890, historically dominated by an agricultural economy and a rural lifestyle, South Dakota has recently sought to diversify its economy in areas to attract and retain residents. South Dakotas history and rural character still strongly influence the culture of the state, South Dakota is situated in the north-central United States, and is considered a part of the Midwest by the U. S. Census Bureau, it is also part of the Great Plains region. The culture, economy, and geography of western South Dakota have more in common with the West than the Midwest, South Dakota has a total area of 77,116 square miles, making the state the 17th largest in the Union. Black Elk Peak, formerly named Harney Peak, with an elevation of 7,242 ft, is the states highest point, while the shoreline of Big Stone Lake is the lowest, with an elevation of 966 ft. South Dakota is bordered to the north by North Dakota, to the south by Nebraska, to the east by Iowa and Minnesota, the geographical center of the U. S. is 17 miles west of Castle Rock in Butte County. The North American continental pole of inaccessibility is located between Allen and Kyle,1,024 mi from the nearest coastline, the Missouri River is the largest and longest river in the state. Other major South Dakota rivers include the Cheyenne, James, Big Sioux, Eastern South Dakota has many natural lakes, mostly created by periods of glaciation. Additionally, dams on the Missouri River create four large reservoirs, Lake Oahe, Lake Sharpe, Lake Francis Case, South Dakota can generally be divided into three regions, eastern South Dakota, western South Dakota, and the Black Hills. The Missouri River serves as a boundary in terms of geographic, social, at times the Black Hills are combined with the rest of western South Dakota, and people often refer to the resulting two regions divided by the Missouri River as West River and East River
27.
Minnesota
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Minnesota is a state in the midwestern and northern regions of the United States. Minnesota was admitted as the 32nd U. S. state on May 11,1858, the state has a large number of lakes, and is known by the slogan Land of 10,000 Lakes. Its official motto is LÉtoile du Nord, Minnesota is the 12th largest in area and the 21st most populous of the U. S. Minnesota is known for its progressive political orientation and its high rate of civic participation and voter turnout. Until European settlement, Minnesota was inhabited by the Dakota and Ojibwe/Anishinaabe, in recent decades, immigration from Asia, the Horn of Africa, and Latin America has broadened its historic demographic and cultural composition. Minnesotas standard of living index is among the highest in the United States, Native Americans demonstrated the name to early settlers by dropping milk into water and calling it mnisota. Many places in the state have similar names, such as Minnehaha Falls, Minneiska, Minneota, Minnetonka, Minnetrista, and Minneapolis, a combination of mni and polis, Minnesota is the second northernmost U. S. state. Its isolated Northwest Angle in Lake of the Woods county is the part of the 48 contiguous states lying north of the 49th parallel. The state is part of the U. S. region known as the Upper Midwest and it shares a Lake Superior water border with Michigan and a land and water border with Wisconsin to the east. Iowa is to the south, North Dakota and South Dakota are to the west, with 86,943 square miles, or approximately 2.25 percent of the United States, Minnesota is the 12th-largest state. Minnesota has some of the Earths oldest rocks, gneisses that are about 3.6 billion years old. About 2.7 billion years ago, basaltic lava poured out of cracks in the floor of the primordial ocean, the roots of these volcanic mountains and the action of Precambrian seas formed the Iron Range of northern Minnesota. Following a period of volcanism 1, in more recent times, massive ice sheets at least one kilometer thick ravaged the landscape of the state and sculpted its terrain. The Wisconsin glaciation left 12,000 years ago and these glaciers covered all of Minnesota except the far southeast, an area characterized by steep hills and streams that cut into the bedrock. This area is known as the Driftless Zone for its absence of glacial drift, much of the remainder of the state outside the northeast has 50 feet or more of glacial till left behind as the last glaciers retreated. Gigantic Lake Agassiz formed in the northwest 13,000 years ago and its bed created the fertile Red River valley, and its outflow, glacial River Warren, carved the valley of the Minnesota River and the Upper Mississippi downstream from Fort Snelling. Minnesota is geologically quiet today, it experiences earthquakes infrequently, the states high point is Eagle Mountain at 2,301 feet, which is only 13 miles away from the low of 601 feet at the shore of Lake Superior. Notwithstanding dramatic local differences in elevation, much of the state is a rolling peneplain. Two major drainage divides meet in Minnesotas northeast in rural Hibbing, forming a triple watershed, precipitation can follow the Mississippi River south to the Gulf of Mexico, the Saint Lawrence Seaway east to the Atlantic Ocean, or the Hudson Bay watershed to the Arctic Ocean
28.
Devil's Lake State Park (Wisconsin)
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This is about the state park in Wisconsin. For parks with similar names, see Devils Lake State Park Devils Lake State Park is a park located in the Baraboo Range in eastern Sauk County, just south of Baraboo. Devils Lake State Park is the biggest state park in Wisconsin and it is around thirty-five miles northwest of Madison, and is on the western edge of the last ice-sheet deposited during the Wisconsin drift. The sand at the bottom of Devils Lake is thought to be deposited by glaciers, Devils Lake is situated in the Baraboo Hills. In 1974, the National Park Service declared the Southern portion of the Baraboo Hills a National Natural Landmark, the Nature Conservancy also designated it as one of the Last Great Places, it is one of only 77 of these places in the world. Loess covers most of the hills and forms the parent material of a silt loam soil. During the autumn, the parks brilliant foliage makes it a popular attraction, the lake is surrounded by a mixed conifer-deciduous forest and the Baraboo Hills are also home to one of the largest contiguous hardwood forests in the Midwest. Due to the geological history of Devils Lake and the Baraboo Range. The lake itself is rectangular in shape and is a little over a long from north to south. It has many cliffs, waterfalls, unique rock formations and a variety of animal, one of the most notable features of the park is the presence of large talus slopes on three sides of the lake. Both the north and south shores have food courts and modern restroom facilities, the park has trails ranging from handicapped accessible paved trails to difficult hiking or bouldering trails. There are also designated rock climbing areas for all levels of experienced climbers, there are also bike trails available. Devils Lake State Park contains eight miles of bike trails. There are three popular campgrounds at the park containing 407 campsites all together, one of which contains a sledding hill, there are many quartzite rock formations, such as Balanced Rock and Devils Doorway, throughout the park. Effigy mounds are located throughout the park. The park contains approximately twelve miles of the 1, 200-mile Ice Age Trail, Parfreys Glen, Wisconsins first state natural area, is managed by the Devils Lake State Park and located just east of the park. Nearby attractions include Devils Head Resort, Cascade Mountain Resort, the area where the park now stands was first settled by pioneers in the mid-1800s. By the start of the 20th century, the area had become a vacation destination for wealthy families from Chicago
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Baraboo Range
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Baraboo Range is a syncline located in Columbia and Sauk Counties, Wisconsin. It consists of highly eroded Precambrian metamorphic rock and it is about 25 miles long and varies from 5 to 10 miles in width. The Wisconsin River, previously traveling in a north to south direction, the eastern end of the range was glaciated during the Wisconsinian glaciation, while the western half was not, and consequently, marks the eastern boundary of Wisconsins Driftless Area. The city of Baraboo is in the center of the valley, the range was designated a National Natural Landmark in 1980. The range is an example of a mountain range exposed through erosion. The rocks are as much as 1.5 billion years old, among the oldest exposed rocks in North America, consisting mainly of gray to pink Baraboo Quartzite and red rhyolite. The Baraboos are composed of resistant Precambrian quartzite which has formed an erosional remnant or monadnock, the mountains may have formed as long ago as the late Precambrian. These formations were buried by Paleozoic sedimentary strata and are still being uncovered by the erosion of the softer, Devils Lake, the centerpiece of Devils Lake State Park, was formed from terminal moraines blocking access to its outlet, creating what is today an endorheic lake
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Wisconsin
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Wisconsin is a U. S. state located in the north-central United States, in the Midwest and Great Lakes regions. It is bordered by Minnesota to the west, Iowa to the southwest, Illinois to the south, Lake Michigan to the east, Michigan to the northeast, Wisconsin is the 23rd largest state by total area and the 20th most populous. The state capital is Madison, and its largest city is Milwaukee, the state is divided into 72 counties. Wisconsin is second to Michigan in the length of its Great Lakes coastline, Wisconsin is known as Americas Dairyland because it is one of the nations leading dairy producers, particularly famous for its cheese. Manufacturing, especially paper products, information technology, and tourism are major contributors to the states economy. The word Wisconsin originates from the given to the Wisconsin River by one of the Algonquian-speaking Native American groups living in the region at the time of European contact. French explorer Jacques Marquette was the first European to reach the Wisconsin River, arriving in 1673, subsequent French writers changed the spelling from Meskousing to Ouisconsin, and over time this became the name for both the Wisconsin River and the surrounding lands. English speakers anglicized the spelling from Ouisconsin to Wisconsin when they began to arrive in numbers during the early 19th century. The legislature of Wisconsin Territory made the current spelling official in 1845, the Algonquin word for Wisconsin and its original meaning have both grown obscure. Interpretations vary, but most implicate the river and the red sandstone that lines its banks, other theories include claims that the name originated from one of a variety of Ojibwa words meaning red stone place, where the waters gather, or great rock. Wisconsin has been home to a variety of cultures over the past 12,000 years. The first people arrived around 10,000 BCE during the Wisconsin Glaciation and these early inhabitants, called Paleo-Indians, hunted now-extinct ice age animals such as the Boaz mastodon, a prehistoric mastodon skeleton unearthed along with spear points in southwest Wisconsin. After the ice age ended around 8000 BCE, people in the subsequent Archaic period lived by hunting, fishing, agricultural societies emerged gradually over the Woodland period between 1000 BCE to 1000 CE. Toward the end of period, Wisconsin was the heartland of the Effigy Mound culture. Later, between 1000 and 1500 CE, the Mississippian and Oneota cultures built substantial settlements including the village at Aztalan in southeast Wisconsin. The Oneota may be the ancestors of the modern Ioway and Ho-Chunk tribes who shared the Wisconsin region with the Menominee at the time of European contact, the first European to visit what became Wisconsin was probably the French explorer Jean Nicolet. He canoed west from Georgian Bay through the Great Lakes in 1634, pierre Radisson and Médard des Groseilliers visited Green Bay again in 1654–1666 and Chequamegon Bay in 1659–1660, where they traded for fur with local Native Americans. In 1673, Jacques Marquette and Louis Jolliet became the first to record a journey on the Fox-Wisconsin Waterway all the way to the Mississippi River near Prairie du Chien
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Wasatch Range
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The Wasatch Range /ˈwɑːsætʃ/ is a mountain range that stretches approximately 160 miles from the Utah-Idaho border, south through central Utah in the western United States. It is the edge of the greater Rocky Mountains. The northern extension of the Wasatch Range, the Bear River Mountains, extends just into Idaho, according to the Utah History Encyclopedia, Wasatch in Ute means mountain pass or low pass over high range. According to William Bright the mountains were named for a Shoshoni leader who was named with the Shoshoni term wasattsi, since the earliest days of settlement, the majority of Utahs population has chosen to settle along the ranges western front, where numerous river drainages exit the mountains. The mountains were a source of water, timber. Today, 85% of Utahs population lives within 15 miles of the Wasatch Range and this concentration is known as the Wasatch Front and has a population of just over 2,000,000 residents. Salt Lake City lies between the Wasatch Range and the Great Salt Lake, at 11,928 feet, Mount Nebo, a triple peak rising above Nephi, Utah at the southern end of the range, is the highest peak of the Wasatch. In some places the mountains rise immediately from the base elevation of 4,330 feet to over 11,000 feet. Since they top out just below 12,000 feet, Wasatch peaks are not especially high compared to the Colorado Rockies or even the Uinta Mountains, the other main portion of the Rocky Mountains in Utah. However, they are sculpted by glaciers, yielding notably rugged and they also receive heavy falls of snow, in some places over 500 inches per year. This great snowfall, with its runoff, made possible a prosperous urban strip of some 25 cities along nearly 100 miles of mountain frontage. The Wasatch Range is home to a concentration of ski areas, with 11 stretching from Sundance in northern Utah County to Powder Mountain. There is also one ski resort in the Bear River Mountains, Park City alone is bordered by two ski resorts. Further north, Big Cottonwood Canyon features tricky climbing on quartzite, the canyons are located within 24 miles of downtown Salt Lake City and the year-round paved roadways can reach 5,000 ft higher in elevation above the city within a short distance. Dirt roads readily drivable in passenger cars with moderate clearance stretch up from Park City, Heber and these reach about 10,000 feet above sea level and provide impressive long-range high country views. Mount Nebo, the highest peak of the Wasatch, is located at the edge of the range. The Colorado Plateau comes to its northwest corner here as it meets the end of the Rocky Mountains. The range is punctuated by a series of faults, chief among them the Wasatch fault
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Utah
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Utah is a state in the western United States. It became the 45th state admitted to the U. S. on January 4,1896, Utah is the 13th-largest by area, 31st-most-populous, and 10th-least-densely populated of the 50 United States. Utah has a population of more than 3 million, approximately 80% of whom live along the Wasatch Front, Utah is bordered by Colorado to the east, Wyoming to the northeast, Idaho to the north, Arizona to the south, and Nevada to the west. It also touches a corner of New Mexico in the southeast, approximately 62% of Utahns are reported to be members of The Church of Jesus Christ of Latter-day Saints or LDS, which greatly influences Utahn culture and daily life. The LDS Churchs world headquarters is located in Salt Lake City, Utah is the only state with a majority population belonging to a single church. The state is a center of transportation, education, information technology and research, government services, mining, in 2013, the U. S. Census Bureau estimated that Utah had the second fastest-growing population of any state. St. George was the metropolitan area in the United States from 2000 to 2005. Utah also has the 14th highest median income and the least income inequality of any U. S. state. A2012 Gallup national survey found Utah overall to be the best state to live in based on 13 forward-looking measurements including various economic, lifestyle, the name Utah is derived from the name of the Ute tribe. It means people of the mountains in the Ute language, according to other sources Utah is derived from the Apache name Yudah which means Tall. These Native American tribes are subgroups of the Ute-Aztec Native American ethnicity and were sedentary, the Ancestral Pueblo people built their homes through excavations in mountains, and the Fremont people built houses of straw before disappearing from the region around the 15th century. Another group of Native Americans, the Navajo, settled in the region around the 18th century, in the mid-18th century, other Uto-Aztecan tribes, including the Goshute, the Paiute, the Shoshone, and the Ute people, also settled in the region. These five groups were present when the first European explorers arrived, the southern Utah region was explored by the Spanish in 1540, led by Francisco Vásquez de Coronado, while looking for the legendary Cíbola. A group led by two Catholic priests—sometimes called the Dominguez-Escalante Expedition—left Santa Fe in 1776, hoping to find a route to the coast of California, the expedition traveled as far north as Utah Lake and encountered the native residents. The Spanish made further explorations in the region, but were not interested in colonizing the area because of its desert nature, in 1821, the year Mexico achieved its independence from Spain, the region became known as part of its territory of Alta California. European trappers and fur traders explored some areas of Utah in the early 19th century from Canada, the city of Provo, Utah was named for one, Étienne Provost, who visited the area in 1825. The city of Ogden, Utah was named after Peter Skene Ogden, in late 1824, Jim Bridger became the first known English-speaking person to sight the Great Salt Lake. Due to the salinity of its waters, Bridger thought he had found the Pacific Ocean
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Appalachian Mountains
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The Appalachian Mountains, often called the Appalachians, are a system of mountains in eastern North America. The Appalachians first formed roughly 480 million years ago during the Ordovician Period and it once reached elevations similar to those of the Alps and the Rocky Mountains before naturally occurring erosion. The Appalachian chain is a barrier to east-west travel, as it forms a series of alternating ridgelines, definitions vary on the precise boundaries of the Appalachians. A common variant definition does not include the Adirondack Mountains, which belong to the Grenville Orogeny and have a different geological history from the rest of the Appalachians. The range covers parts of the islands of Saint Pierre and Miquelon, the system is divided into a series of ranges, with the individual mountains averaging around 3,000 ft. The highest of the group is Mount Mitchell in North Carolina at 6,684 feet, the term Appalachian refers to several different regions associated with the mountain range. Most broadly, it refers to the mountain range with its surrounding hills. The Ouachita Mountains in Arkansas and Oklahoma were originally part of the Appalachians as well, the name was soon altered by the Spanish to Apalachee and used as a name for the tribe and region spreading well inland to the north. Pánfilo de Narváezs expedition first entered Apalachee territory on June 15,1528, now spelled Appalachian, it is the fourth-oldest surviving European place-name in the US. After the de Soto expedition in 1540, Spanish cartographers began to apply the name of the tribe to the mountains themselves. The first cartographic appearance of Apalchen is on Diego Gutierrezs map of 1562, the name was not commonly used for the whole mountain range until the late 19th century. A competing and often more popular name was the Allegheny Mountains, Alleghenies, in the early 19th century, Washington Irving proposed renaming the United States either Appalachia or Alleghania. In U. S. dialects in the regions of the Appalachians. In northern parts of the range, it is pronounced /ˌæpəˈleɪtʃᵻnz/ or /ˌæpəˈleɪʃᵻnz/, the third syllable is like lay. There is often debate between the residents of the regions as to which pronunciation is the more correct one. Elsewhere, a commonly accepted pronunciation for the adjective Appalachian is /ˌæpəˈlætʃiən/, the whole system may be divided into three great sections, Northern, The northern section runs from the Canadian province of Newfoundland and Labrador to the Hudson River. The Monteregian Hills, which cross the Green Mountains in Quebec, are also unassociated with the Appalachians, Central, The central section goes from the Hudson Valley to the New River running through Virginia and West Virginia. Southern, The southern section runs from the New River onwards and it consists of the prolongation of the Blue Ridge, which is divided into the Western Blue Ridge Front and the Eastern Blue Ridge Front, the Ridge-and-Valley Appalachians, and the Cumberland Plateau
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Arizona
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Arizona is a state in the southwestern region of the United States. It is also part of the Western United States and the Mountain West states and it is the sixth largest and the 14th most populous of the 50 states. Its capital and largest city is Phoenix, Arizona is one of the Four Corners states. It has borders with New Mexico, Utah, Nevada, California, and Mexico, Arizonas border with Mexico is 389 miles long, on the northern border of the Mexican states of Sonora and Baja California. Arizona is the 48th state and last of the states to be admitted to the Union. Historically part of the territory of Alta California in New Spain, after being defeated in the Mexican–American War, Mexico ceded much of this territory to the United States in 1848. The southernmost portion of the state was acquired in 1853 through the Gadsden Purchase, Southern Arizona is known for its desert climate, with very hot summers and mild winters. There are ski resorts in the areas of Flagstaff, Alpine, in addition to the Grand Canyon National Park, there are several national forests, national parks, and national monuments. To the European settlers, their pronunciation sounded like Arissona, the area is still known as alĭ ṣonak in the Oodham language. Another possible origin is the Basque phrase haritz ona, as there were numerous Basque sheepherders in the area, There is a misconception that the states name originated from the Spanish term Árida Zona. See also lists of counties, islands, rivers, lakes, state parks, national parks, Arizona is in the Southwestern United States as one of the Four Corners states. Arizona is the sixth largest state by area, ranked after New Mexico, of the states 113,998 square miles, approximately 15% is privately owned. The remaining area is public forest and park land, state trust land, Arizona is well known for its desert Basin and Range region in the states southern portions, which is rich in a landscape of xerophyte plants such as the cactus. This regions topography was shaped by volcanism, followed by the cooling-off. Its climate has hot summers and mild winters. The state is well known for its pine-covered north-central portion of the high country of the Colorado Plateau. Like other states of the Southwest United States, Arizona has an abundance of mountains, despite the states aridity, 27% of Arizona is forest, a percentage comparable to modern-day France or Germany. The worlds largest stand of pine trees is in Arizona
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Quartzsite, Arizona
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Quartzsite is a town in La Paz County, Arizona, United States. According to the 2010 census, the population was 3,677, interstate 10 runs directly through Quartzsite and is at the intersection of U. S. Route 95 and Arizona State Route 95 with I-10. Quartzsite is located at 33°39′54″N 114°13′15″W, according to the United States Census Bureau Quartzsite is all land and has a total area of 36.3 sq mi. Quartzsite lies on the portion of the La Posa Plain along Tyson Wash. The Dome Rock Mountains overlook the town on the west with Granite Mountain on the southwest edge of the town, the Plomosa Mountains lie across the La Posa Plain to the east. The town has a hot climate with mild to warm winters from November to March. In the middle of summer, Quartzsite is one of the hottest places in the United States and has recorded temperatures as high as 122 °F or 50.0 °C on 28 July 1995. There is very little precipitation with only 3.51 inches falling during a year, while in May. This moisture was due to the remnants of a rare Gulf of California hurricane, the driest calendar year was 1928 with 0.92 inches. However, between July 2001 and August 2002 as little as 0.45 inches fell over fourteen months, as of the census of 2000, there were 3,354 people,1,850 households, and 1,176 families residing in the town. The population density was 92.4 people per square mile, there were 3,186 housing units at an average density of 87.8 per square mile. The racial makeup of the town was 94. 48% White,0. 24% Black or African American,1. 16% Native American,0. 27% Asian,0. 06% Pacific Islander,2. 59% from other races, and 1. 19% from two or more races. 5. 04% of the population were Hispanic or Latino of any race,31. 5% of all households were made up of individuals and 19. 1% had someone living alone who was 65 years of age or older. The average household size was 1.81 and the family size was 2.18. In the town, the population was out with 5. 7% under the age of 18,1. 8% from 18 to 24,7. 7% from 25 to 44,29. 9% from 45 to 64. The median age was 66 years, for every 100 females there were 102.8 males. For every 100 females age 18 and over, there were 101.9 males, the median income for a household in the town was $23,053, and the median income for a family was $26,382. Males had an income of $20,313 versus $16,080 for females
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Coeur d'Alene, Idaho
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Coeur dAlene is the largest city and county seat of Kootenai County, Idaho, United States. It is the city of the Coeur dAlene Metropolitan Statistical Area. As of the 2010 census, the population of Coeur dAlene was 44,137, the city is about 30 miles east of the larger Spokane, Washington, of which it is a satellite. The two cities, are the key components of the Spokane-Coeur dAlene Combined Statistical Area, of which Coeur dAlene is the third largest city, Coeur dAlene is the largest city in northern Idaho Panhandle. The city is situated on the shore of Lake Coeur dAlene. Locally, Coeur dAlene is known as the Lake City, or simply called by its initials, the city of Coeur dAlene has grown significantly in recent years, in part because of a substantial increase in tourism, encouraged by several resorts in the area. Broadcaster and media figure Barbara Walters called the city a little slice of Heaven, on November 28,2007, Good Morning America broadcast the citys Christmas lighting ceremony because its display is among the largest in the United States. The Coeur dAlene Resort takes up a prominent portion of the citys downtown and it is also near two major ski resorts, Silver Mountain Resort to the east in Kellogg, and Schweitzer Mountain Ski Resort to the north in Sandpoint. The Coeur dAlene people called themselves by the autonym Schitsuumsh in Coeur dAlene, one of the Salishan languages and this area was extensively explored by David Thompson of the North West Company starting in 1807. The Oregon boundary dispute arose as a result of competing British, the British had trading ties extending from Canada and had started settlements in present-day British Columbia and at Fort Astoria on the Pacific coast near the mouth of the Columbia River. The Oregon Treaty of 1846 ended the joint occupation of the area in present-day Idaho when Britain ceded all rights to land south of the 49th parallel to the United States. When General William T. Sherman ordered a fort constructed on the lake in the 1870s, he gave it the name Fort Coeur dAlene, the name of the fort was later changed to Fort Sherman to honor the general. North Idaho College, a community college, now occupies the fort site. The lake was named for the Coeur dAlene. Miners and settlers came to the region after silver deposits were found and it became the second-largest silver mining district in the country, generating both great wealth and extensive environmental contamination and damages. In the 1890s, two significant miners uprisings took place in the Coeur dAlene Mining District, where the workers struggled with high risk and he later confessed to dynamiting a $250,000 mill belonging to the Bunker Hill Mining Company near Wardner during another miners uprising in 1899. He returned later to Idaho to assassinate former Idaho Governor Frank Steunenberg in 1905, Coeur dAlene is located at 47°41′34″N 116°46′48″W, at an elevation of 2,180 ft above sea level. According to the United States Census Bureau, the city has an area of 16.08 square miles
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Idaho
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Idaho is a state in the northwestern region of the United States. It borders the state of Montana to the east and northeast, Wyoming to the east, Nevada and Utah to the south, to the north, it shares a small portion of the Canadian border with the province of British Columbia. With a population of around 1.7 million people and an area of 83,569 square miles, Idaho is the 14th largest, the states capital and largest city is Boise. Idaho prior to European settlement was inhabited solely by Native American peoples, in the early 19th century, Idaho was considered part of the Oregon Country, an area disputed between the U. S. and the United Kingdom. Idaho was eventually admitted to the Union on July 3,1890, forming part of the Pacific Northwest, Idaho is divided into several distinct geographic and climatic regions. In the states north, the relatively isolated Idaho Panhandle is closely linked with Eastern Washington, the states south includes the Snake River Plain, while the south-east incorporates part of the Great Basin. Idaho is quite mountainous, and contains several stretches of the Rocky Mountains, additionally, around 38 percent of Idahos land is held by the United States Forest Service, the most of any state. Industries significant for the economy include manufacturing, agriculture, mining, forestry. Idahos agricultural sector supplies a number of different products, but the state is best known for its potato crop, the official state nickname is the Gem State, which references Idahos reputation for gemstones and, more broadly, its many wilderness areas. The exact origin of the remains a mystery. Willing later claimed that he had invented the name. Congress ultimately decided to name the area Colorado Territory when it was created in February 1861, thinking they would get a jump on the name, locals named a community in Colorado Idaho Springs. However, the name Idaho did not fall into obscurity, the same year Congress created Colorado Territory, a county called Idaho County was created in eastern Washington Territory. The county was named after a steamship named Idaho, which was launched on the Columbia River in 1860 and it is unclear whether the steamship was named before or after Willings claim was revealed. Regardless, a portion of Washington Territory, including Idaho County, was used to create Idaho Territory in 1863. Despite this lack of evidence for the origin of the name, the name Idaho may be derived from the Plains Apache word ídaahę́, which means enemy. The Comanches used this word to refer to the Idaho Territory, a 1956 Idaho history textbook says, Idaho is a Shoshoni Indian exclamation. The word consists of three parts, the first is Ee, which in English conveys the idea of coming down
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Stiperstones
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The Stiperstones is a distinctive hill in the county of Shropshire, England. It is a ridge formed some 480 million years ago. At 536 metres above sea level it is the second-highest hill in the county, Stiperstones 8-kilometre summit ridge is crowned by several rugged, jagged outcrops of rock silhouetted against the sky. The Stiperstones is noted for its tors of quartzite, the Devils Chair is the largest and best known. The Stiperstones is a National Nature Reserve and Site of Special Scientific Interest, and is within the Shropshire Hills Area of Outstanding Natural Beauty. It is a haven for wildlife, with birds that are associated with upland areas present, including red grouse, Eurasian curlew, peregrine falcon. Back to Purple is managed by a partnership of Natural England, Forest Enterprise and their work has so far seen removal of thousands of pine trees and conifers, including the whole Gatten Plantation and the previously covered Nipstone Rock has emerged from hiding. Thousands of heather seedlings have been planted to supplement natural regeneration. The general area has a history of lead mining, most notably during the Roman occupation of Britain. Several pigs of lead have been nearby, and the tradition continued into Victorian times. The area around the Stiperstones is rich in myths and folklore relating to the rocks of the Devils Chair, D. H. Lawrence used the Stiperstones and the Devils Chair in particular as a setting for his novel St Mawr. The Half Man Half Biscuit album 90 Bisodol contains a track entitled Descent of the Stiperstones, until the early 20th century lead was mined at The Bog, just west of Stiperstones. The Bog Visitor Centre is the facility for visitors to the Stiperstones. It is housed in the village school and retains its old interior design. It provides historical information about the past workers, mining, facilities at the centre include toilets and car parking. Activities include walking, with two circular walks called Mucklewick Walk and Flenny Bank Walk and a variety of riding routes. On 25 July 2012 part of the reserve was devastated by fire, said to have been a result of the sudden upturn in dry, hot weather coupled with the large amount of dry heather on the hills. More than 70 firemen battled the fire between 15.00 and 22.00 BST, smoke could be seen up to 10 miles away in the county town of Shrewsbury
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Ordovician
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The Ordovician is a geologic period and system, the second of six periods of the Paleozoic Era. The Ordovician spans 41.2 million years from the end of the Cambrian Period 485.4 million years ago to the start of the Silurian Period 443.8 Mya. Lapworth recognized that the fauna in the disputed strata were different from those of either the Cambrian or the Silurian periods. It received international sanction in 1960, when it was adopted as a period of the Paleozoic Era by the International Geological Congress. Life continued to flourish during the Ordovician as it did in the earlier Cambrian period, invertebrates, namely molluscs and arthropods, dominated the oceans. The Great Ordovician Biodiversification Event considerably increased the diversity of life, fish, the worlds first true vertebrates, continued to evolve, and those with jaws may have first appeared late in the period. Life had yet to diversify on land, about 100 times as many meteorites struck the Earth during the Ordovician compared with today. The Ordovician Period began with a major extinction called the Cambrian–Ordovician extinction event and it lasted for about 42 million years and ended with the Ordovician–Silurian extinction event, about 443.8 Mya which wiped out 60% of marine genera. The dates given are recent radiometric dates and vary slightly from those found in other sources and this second period of the Paleozoic era created abundant fossils that became major petroleum and gas reservoirs. The boundary chosen for the beginning of both the Ordovician Period and the Tremadocian stage is highly significant and it correlates well with the occurrence of widespread graptolite, conodont, and trilobite species. The base of the Tremadocian allows scientists to relate these species not only to each other and this makes it easier to place many more species in time relative to the beginning of the Ordovician Period. A number of terms have been used to subdivide the Ordovician Period. In 2008, the ICS erected an international system of subdivisions. There exist Baltoscandic, British, Siberian, North American, Australian, the Ordovician Period in Britain was traditionally broken into Early, Middle and Late epochs. The corresponding rocks of the Ordovician System are referred to as coming from the Lower, Middle, the Floian corresponds to the lower Arenig, the Arenig continues until the early Darriwilian, subsuming the Dapingian. The Llanvirn occupies the rest of the Darriwilian, and terminates with it at the base of the Late Ordovician. The Sandbian represents the first half of the Caradoc, the Caradoc ends in the mid-Katian, during the Ordovician, the southern continents were collected into Gondwana. Gondwana started the period in equatorial latitudes and, as the period progressed, drifted toward the South Pole, the small continent Avalonia separated from Gondwana and began to move north towards Baltica and Laurentia, opening the Rheic Ocean between Gondwana and Avalonia
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Arenig
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For the mountains in Wales, see Arenigs. In geology, the Arenigian refers both to an interval during the Lower Ordovician period and also to the suite of rocks which were deposited during this interval. The term was first used by Adam Sedgwick in 1847 with reference to the Arenig Ashes and Porphyries in the neighbourhood of Arenig Fawr, the rock-succession in the Arenig district has been recognized by W. G. Fearnsides. It was to the series that Sedgwick first applied the term Arenig. In the typical region and in North Wales generally the Arenig series appears to be unconformable upon the Cambrian rocks and it may be mentioned here that the Llanvirn Series of H. Hicks was equivalent to the bifidus shale and the Lower Llandeilo Series. The Arenigian and Floian are the part of the Lower Ordovician. Either is followed by the Middle Ordovician ICS Dapingian or by the Llanvirnian of older chronologies, the Arenig group was deposited during a sudden worldwide rise in sea level resulting in widespread marine transgression. The early Ordovician surge in marine diversity also began around this time and these genera may survive into later portions of the Arenig stage, or even into later geological stages. This list should not be thought of in terms of the lifespan of the genera included and these genera may survive into later portions of the Arenig stage, or even into later geological stages. This list should not be thought of in terms of the lifespan of the genera included, upper The following is a list of Endocerid genera whose fossils are geochronologically found first in upper Arenig strata. These genera may survive into later portions of the Arenig stage and this list should not be thought of in terms of the lifespan of the genera included
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Long Mynd
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The Long Mynd is a heath and moorland plateau that forms part of the Shropshire Hills in Shropshire, England. The high ground, which is designated as an Area of Outstanding Natural Beauty, much of it is owned and managed by the National Trust. It is surrounded by the settlements of Church Stretton, Little Stretton and All Stretton, Pulverbatch, Smethcott, Woolstaston, Asterton, Myndtown, Wentnor. The highest point on the Long Mynd is Pole Bank, this, the name Long Mynd means Long Mountain, the second element being Brittonic in origin. In modern Welsh it is named Mynydd Hir, which has the same meaning, the geology dates back to Precambrian, and during the time would have been 60° south of the equator, the same latitude as the Falkland Islands. Shropshire would have been at the edge of a large continent near the sea. The area had broad rivers, evidence of mudflats has been found, the rivers would have flowed out to sea, creating large estuaries, over time, the mudflats would have built up, and volcanic eruptions deposited ash in layers between the sand and mud. The primary rock of the Long Mynd is sandstone, usually coloured purple or grey, the volcanoes created the nearby Stretton Hills and the Wrekin, and eruptions would have been frequent. There are layers in the rocks of the Long Mynd that were described as raindrop marks. Unpublished research, including electron micrographs, by the now deceased Professor Martin Brasier, field observations of the stratigraphy present, and its laminar nature, leave no doubt that they are in a marine environment, the absence of infilled or mineralised syncresis further add to this. Examples of these fossilised marks can be viewed today in the National Trust Tearoom Exhibition, the layers of rock built up over the millennia to create an approximately 7,000 m thick layer composed of sand, mud, silt and very occasional thin ash bands. The stratrigraphy, mineral compositions and surrounding volcanology suggests an island arc basin. Towards the end of the Precambrian period, the volcanoes ceased their eruptions, instead the forces that created the volcanoes caused the new rocks to lift and fold, creating mountains and valleys in the area. Much of the rock was melted during this period, underneath the Earths crust, the Church Stretton Fault zone probably formed during this period. The hill Caer Caradoc adjacent to the Long Mynd and from the time is volcanic in origin. During the Cambrian, Shropshire was flooded by the sea, after the Global Ice Age ended 545 million years ago, thick layers of beach pebbles and white sand were built up against the sea cliffs that were once molten lava. During this time, the shallow sea played host to the explosion of new life which occurred during the Cambrian. Shropshire has some of the most historically important evidence in the explosion of life, trilobites that are found in the county are internationally important for deciding how the Cambrian is divided into smaller segments of time
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Shropshire
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Shropshire Council was created in 2009, a unitary authority taking over from the previous county council and five district councils. The borough of Telford and Wrekin has been a unitary authority since 1998. The county has many towns, including Whitchurch in the north, Newport north-east of Telford. The Ironbridge Gorge area is a UNESCO World Heritage Site, covering Ironbridge, Coalbrookdale, there are other historic industrial sites in the county, such as at Shrewsbury, Broseley, Snailbeach and Highley, as well as the Shropshire Union Canal. The Shropshire Hills Area of Outstanding Natural Beauty covers about a quarter of the county, Shropshire is one of Englands most rural and sparsely populated counties, with a population density of 136/km2. The Wrekin is one of the most famous landmarks in the county, though the highest hills are the Clee Hills, Stiperstones. Wenlock Edge is another significant geographical and geological landmark, the River Severn, Great Britains longest river, runs through the county, exiting into Worcestershire via the Severn Valley. Shropshire is landlocked and with an area of 3,487 square kilometres is Englands largest inland county, the county flower is the round-leaved sundew. The area was part of the lands of the Cornovii. This was a tribal Celtic iron age kingdom and their capital in pre-Roman times was probably a hill fort on the Wrekin. Ptolemys 2nd century Geography names one of their towns as being Viroconium Cornoviorum, after the Roman occupation of Britain ended in the 5th century, the Shropshire area was in the eastern part of the Welsh Kingdom of Powys, known in Welsh poetry as the Paradise of Powys. It was annexed to the Angle kingdom of Mercia by King Offa in the 8th century, in subsequent centuries, the area suffered repeated Danish invasion, and fortresses were built at Bridgnorth and Chirbury. Many defensive castles were built at this time across the county to defend against the Welsh and enable effective control of the region, including Ludlow Castle, the western frontier with Wales was not finally determined until the 14th century. Also in this period, a number of foundations were formed, the county largely falling at this time under the Diocese of Hereford. The county contains a number of historically significant towns, including Shrewsbury, Bridgnorth, additionally, the area around Coalbrookdale in the county is seen as highly significant, as it is regarded as one of the birthplaces of the Industrial Revolution. The village of Edgmond, near Newport, is the location of the lowest recorded temperature in England, the origin of the name Shropshire is the Old English Scrobbesbyrigscīr, which means Shrewsburyshire. The name may, therefore, be derived indirectly from a name such as Scrope. Salop is an old name for Shropshire, historically used as a form for post or telegrams
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England
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England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west, the Irish Sea lies northwest of England and the Celtic Sea lies to the southwest. England is separated from continental Europe by the North Sea to the east, the country covers five-eighths of the island of Great Britain in its centre and south, and includes over 100 smaller islands such as the Isles of Scilly, and the Isle of Wight. England became a state in the 10th century, and since the Age of Discovery. The Industrial Revolution began in 18th-century England, transforming its society into the worlds first industrialised nation, Englands terrain mostly comprises low hills and plains, especially in central and southern England. However, there are uplands in the north and in the southwest, the capital is London, which is the largest metropolitan area in both the United Kingdom and the European Union. In 1801, Great Britain was united with the Kingdom of Ireland through another Act of Union to become the United Kingdom of Great Britain and Ireland. In 1922 the Irish Free State seceded from the United Kingdom, leading to the latter being renamed the United Kingdom of Great Britain, the name England is derived from the Old English name Englaland, which means land of the Angles. The Angles were one of the Germanic tribes that settled in Great Britain during the Early Middle Ages, the Angles came from the Angeln peninsula in the Bay of Kiel area of the Baltic Sea. The earliest recorded use of the term, as Engla londe, is in the ninth century translation into Old English of Bedes Ecclesiastical History of the English People. According to the Oxford English Dictionary, its spelling was first used in 1538. The earliest attested reference to the Angles occurs in the 1st-century work by Tacitus, Germania, the etymology of the tribal name itself is disputed by scholars, it has been suggested that it derives from the shape of the Angeln peninsula, an angular shape. An alternative name for England is Albion, the name Albion originally referred to the entire island of Great Britain. The nominally earliest record of the name appears in the Aristotelian Corpus, specifically the 4th century BC De Mundo, in it are two very large islands called Britannia, these are Albion and Ierne. But modern scholarly consensus ascribes De Mundo not to Aristotle but to Pseudo-Aristotle, the word Albion or insula Albionum has two possible origins. Albion is now applied to England in a poetic capacity. Another romantic name for England is Loegria, related to the Welsh word for England, Lloegr, the earliest known evidence of human presence in the area now known as England was that of Homo antecessor, dating to approximately 780,000 years ago. The oldest proto-human bones discovered in England date from 500,000 years ago, Modern humans are known to have inhabited the area during the Upper Paleolithic period, though permanent settlements were only established within the last 6,000 years
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Cambrian
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The Cambrian Period was the first geological period of the Paleozoic Era, of the Phanerozoic Eon. The Cambrian lasted 55.6 million years from the end of the preceding Ediacaran Period 541 million years ago to the beginning of the Ordovician Period 485.4 mya and its subdivisions, and its base, are somewhat in flux. The period was established by Adam Sedgwick, who named it after Cambria, the Latinised form of Cymru, the Welsh name for Wales, as a result, our understanding of the Cambrian biology surpasses that of some later periods. The rapid diversification of lifeforms in the Cambrian, known as the Cambrian explosion, most of the continents were probably dry and rocky due to a lack of vegetation. Shallow seas flanked the margins of several continents created during the breakup of the supercontinent Pannotia, the seas were relatively warm, and polar ice was absent for much of the period. The United States Federal Geographic Data Committee uses a barred capital C ⟨Є⟩ character similar to the capital letter Ukrainian Ye ⟨Є⟩ to represent the Cambrian Period, the proper Unicode character is U+A792 Ꞓ LATIN CAPITAL LETTER C WITH BAR. Despite the long recognition of its distinction from younger Ordovician Period rocks and older Supereon Precambrian rocks, the base of the Cambrian lies atop a complex assemblage of trace fossils known as the Treptichnus pedum assemblage. Pedum in Namibia, Spain and Newfoundland, and possibly, in the western USA, the stratigraphic range of T. pedum overlaps the range of the Ediacaran fossils in Namibia, and probably in Spain. The Cambrian Period followed the Ediacaran Period and was followed by the Ordovician Period, the Cambrian is divided into four epochs and ten ages. Currently only two series and five stages are named and have a GSSP, because the international stratigraphic subdivision is not yet complete, many local subdivisions are still widely used. In some of these subdivisions the Cambrian is divided into three epochs with locally differing names – the Early Cambrian, Middle Cambrian and Furongian, rocks of these epochs are referred to as belonging to the Lower, Middle, or Upper Cambrian. Trilobite zones allow biostratigraphic correlation in the Cambrian, each of the local epochs is divided into several stages. The International Commission on Stratigraphy list the Cambrian period as beginning at 541 million years ago, the lower boundary of the Cambrian was originally held to represent the first appearance of complex life, represented by trilobites. The recognition of small shelly fossils before the first trilobites, and Ediacara biota substantially earlier and this formal designation allowed radiometric dates to be obtained from samples across the globe that corresponded to the base of the Cambrian. Early dates of 570 million years ago quickly gained favour, though the used to obtain this number are now considered to be unsuitable. A more precise date using modern radiometric dating yield a date of 541 ±0.3 million years ago, most continental land was clustered in the Southern Hemisphere at this time, but was drifting north. Large, high-velocity rotational movement of Gondwana appears to have occurred in the Early Cambrian, the sea levels fluctuated somewhat, suggesting there were ice ages, associated with pulses of expansion and contraction of a south polar ice cap. In Baltoscandia a Lower Cambrian transgression transformed large swathes of the Sub-Cambrian peneplain into a epicontinental sea, the Earth was generally cold during the early Cambrian, probably due to the ancient continent of Gondwana covering the South Pole and cutting off polar ocean currents
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The Wrekin
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The Wrekin /ˈriːkᵻn/ is a hill in east Shropshire, England. It is located five miles west of Telford, on the border between the districts of Shropshire and Telford and Wrekin. Rising to a height of 1,335 feet above the Shropshire Plain, it is a prominent and well-known landmark, the Wrekin is contained within the northern panhandle of the Shropshire Hills AONB. The hill is popular for walkers and tourists and offers views of Shropshire. It can be well into Staffordshire and the Black Country. The earliest mention of the Wrekin occurs in a charter of 855, as entered in a late 11th century Worcester cartulary, spelled Wreocensetun. Its modern form is believed to have come into modern English by way of Mercian, the minor Anglo-Saxon kingdom of the Wreocensæte existed in the area prior to Mercian reign. For several centuries the hill was known as Mount Gilbert, a given to it by the Normans after a hermit who lived there. There is an Iron Age hill fort on the summit almost 8 ha in size and it is thought the fort was built by the Cornovii tribe and was once their capital. A more recent addition is the Wrekin transmitting station, used for broadcasting, at the top of the main mast is a beacon which emits a red pulse of light every few seconds at night. A beacon was erected on the Wrekin during the Second World War to warn aircraft. A new beacon was installed in 2000, as part of a project to celebrate the new millennium. It is known locally as the Wrekin Beacon, and is visible for miles around. The geology of the Wrekin and its area is complex. The crest of the Wrekins ridge and its slopes are formed from various rocks of volcanic origin assigned to the Uriconian series. The Uriconian Volcanics include rhyolites, tuffs and agglomerates and these rocks – layers of ancient lava flows laid down in a volcanic island arc, similar to modern Japan – are approximately 680 million years old. Dolerite dykes intruded the extrusive volcanic rocks around 563 million years ago, a variety of the intrusive igneous rock granophyre, known as Ercallite forms the northeastern shoulder of the Ercall. It was put in place around 560 million years ago and is overlain by Cambrian rocks of sedimentary origin, the southeastern side of the ridge is largely formed from sandstones and shales of Cambrian age
