1.
Arch dam
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An arch dam is a concrete dam that is curved upstream in plan. An arch dam is most suitable for narrow gorges or canyons with steep walls of rock to support the structure. Since they are thinner than any other dam type, they require much less construction material, Arch dams classified with respect to their structural height are, Low dams up to 100 feet, Medium high dams between 100–300 ft, High dams over 300 ft. The first known arch dam, the Glanum Dam, also known as the Vallon de Baume Dam, was built by the Romans in France, the dam was about 12 metres high and 18 metres in length. Its radius was about 14 m, and it consisted of two masonry walls, the Romans built it to supply nearby Glanum with water. The Monte Novo Dam in Portugal was another early arch dam built by the Romans in 300 AD and it was 5.7 metres high and 52 m long, with a radius of 19 m. The curved ends of the dam met with two winged walls that were supported by two buttresses. The dam also contained two water outlets to drive mills downstream, the Mongols also built arch dams in modern-day Iran. Their earliest was the Kebar Dam built around 1300, which was 26 m high and 55 m long and their second dam was built around 1350 and is called the Kurit Dam. After 4 m was added to the dam in 1850, it became 64 m tall, the Kurit Dam was of masonry design and built in a very narrow canyon. The canyon was so narrow that its crest length is only 44% of its height, the dam is still erect, even though part of its lower downstream face fell off. The Elche Dam in Elche, Spain was an arch dam built in the 1630s by Joanes del Temple. The dam was 26 metres high and 75 metres long, and had a radius of 62 metres and this arch dam also rests on winged walls that served as abutments. In the 20th century, the worlds first variable-radius arch dam was built on the Salmon Creek near Juneau, the Salmon Creek Dams upstream face bulged upstream, which relieved pressure on the stronger, curved lower arches near the abutments. The dam also had a toe, which off-set pressure on the upstream heel of the dam. The technology and economical benefits of the Salmon Creek Dam allowed for larger and taller dam designs, the dam was, therefore, revolutionary, and similar designs were soon adopted around the world, in particular by the U. S. Bureau of Reclamation. Pensacola Dam, completed in the state of Oklahoma in 1940, was considered the longest multiple arch dam in the world, designed by W. R. Holway, it has 51 arches. and a maximum height of 150 ft above the river bed. The total length of the dam and its sections is 6,565 ft while the section is 4,284 ft long
2.
French Riviera
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The Côte dAzur, often known in English as the French Riviera, is the Mediterranean coastline of the southeast corner of France, also including the sovereign state of Monaco. There is no boundary, but it is usually considered to extend from the Italian border in the east to Saint-Tropez, Hyères, Toulon. This coastline was one of the first modern resort areas and it began as a winter health resort for the British upper class at the end of the 18th century. In the summer, it played home to many members of the Rothschild family. After World War II, it became a popular tourist destination and convention site, many celebrities, such as Elton John and Brigitte Bardot, have homes in the region. Officially, the Côte dAzur is home to 163 nationalities with 83,962 foreign residents and its largest city is Nice, which has a population of 347,060. The city is the center of a communauté urbaine – Nice-Côte dAzur – bringing together 24 communes, Nice is home to Nice Côte dAzur Airport, Frances third-busiest airport, which is on an area of partially reclaimed coastal land at the western end of the Promenade des Anglais. A second airport at Mandelieu was once the commercial airport. The A8 autoroute runs through the region, as does the old main road known as the Route nationale 7. Trains serve the region and inland to Grasse, with the TGV Sud Est service reaching Nice-Ville station in five. The French Riviera has a population of more than two million. The region has 35,000 students, of whom 25 percent are working toward a doctorate, the French Riviera is a major yachting and cruising area with several marinas along its coast. As a tourist center, French Riviera benefits from 310 to 330 days of sunshine per year,115 kilometres of coastline, the name Côte dAzur was given to the coast by the writer Stéphen Liégeard in his book, La Côte d’azur, published in December 1887. Liégeard was born in Dijon, in the French department of Côte-dOr, the term French Riviera is typical of English use. It was built by analogy with the term Italian Riviera, which extends east of the French Riviera. As early as the 19th century, the British referred to the region as the Riviera or the French Riviera, usually referring to the part of the coast. Originally, riviera is an Italian noun which means coastline, in Occitan and French, the only usual names are Còsta dAzur in Occitan and Côte dAzur in French. A name like French Riviera is unusual and sounds odd, it could work as a word-to-word translation of the British point of view
3.
France
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France, officially the French Republic, is a country with territory in western Europe and several overseas regions and territories. The European, or metropolitan, area of France extends from the Mediterranean Sea to the English Channel and the North Sea, Overseas France include French Guiana on the South American continent and several island territories in the Atlantic, Pacific and Indian oceans. France spans 643,801 square kilometres and had a population of almost 67 million people as of January 2017. It is a unitary republic with the capital in Paris. Other major urban centres include Marseille, Lyon, Lille, Nice, Toulouse, during the Iron Age, what is now metropolitan France was inhabited by the Gauls, a Celtic people. The area was annexed in 51 BC by Rome, which held Gaul until 486, France emerged as a major European power in the Late Middle Ages, with its victory in the Hundred Years War strengthening state-building and political centralisation. During the Renaissance, French culture flourished and a colonial empire was established. The 16th century was dominated by civil wars between Catholics and Protestants. France became Europes dominant cultural, political, and military power under Louis XIV, in the 19th century Napoleon took power and established the First French Empire, whose subsequent Napoleonic Wars shaped the course of continental Europe. Following the collapse of the Empire, France endured a succession of governments culminating with the establishment of the French Third Republic in 1870. Following liberation in 1944, a Fourth Republic was established and later dissolved in the course of the Algerian War, the Fifth Republic, led by Charles de Gaulle, was formed in 1958 and remains to this day. Algeria and nearly all the colonies became independent in the 1960s with minimal controversy and typically retained close economic. France has long been a centre of art, science. It hosts Europes fourth-largest number of cultural UNESCO World Heritage Sites and receives around 83 million foreign tourists annually, France is a developed country with the worlds sixth-largest economy by nominal GDP and ninth-largest by purchasing power parity. In terms of household wealth, it ranks fourth in the world. France performs well in international rankings of education, health care, life expectancy, France remains a great power in the world, being one of the five permanent members of the United Nations Security Council with the power to veto and an official nuclear-weapon state. It is a member state of the European Union and the Eurozone. It is also a member of the Group of 7, North Atlantic Treaty Organization, Organisation for Economic Co-operation and Development, the World Trade Organization, originally applied to the whole Frankish Empire, the name France comes from the Latin Francia, or country of the Franks
4.
Var (department)
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The Var is a department in the Provence-Alpes-Côte dAzur region in Provence in southeastern France. It takes its name from the river Var, which used to flow along its eastern boundary, Toulon is the largest city and administrative capital of the Var. Other important towns in the Var include Fréjus, Saint-Raphaël, Draguignan, Brignoles, Hyères, the Department of the Var was created at the time of the French Revolution, on March 4,1790, from a portion of the former Royal province of Provence. Its capital was originally Toulon, but this was moved to Grasse in 1793 to punish the Toulonnais for having handed the town to the British in 1793, subsequently the capital was moved to Brignoles in 1795, then to Draguignan in 1797. It was not returned to Toulon until 1974,1815 - Following the defeat of Napoleon at Waterloo the department was occupied by Austrian troops until November 1818. 1854 – The first railroad reaches Toulon and this move also shifted the Var River, which had given the department its name, to the new Department. 1884 – A cholera epidemic struck Toulon, the leader of the fight against the epidemic was Georges Clemenceau, a doctor and a member of the National Assembly for the Seine region. He was elected Deputy from the Var from 1888 to 1893 and Senator from 1902 to 1920, 1914–1918 – The First World War stimulates growth in shipyards and military industries in the region, but weakens the agricultural and food industry. 1942 – The German Army moves from Occupied France into the Unoccupied Zone, the French Fleet is sabotaged in Toulon Harbor to keep it from falling into German hands. The Maquis Vallier, a group of resistance fighters, is active. August 15,1944 – American and Free French forces land at Cap Nègre, at Trayas, at Saint-Tropez, at Sainte-Maxime, the Free French fleet arrived at Toulon on September 13. 1960s – About one hundred thousand French citizens were repatriated from Algeria following the Algerian War of Independence, the Department of the Var has a surface area of 6,032 km2, and 420 km of coastline, including the offshore islands. 56% of the Var is covered with forest and its geological formations are divided into two regions, one composed of limestone to the north-west of a line between Toulon and Draguignan, and of crystalline rock to the south-east. The department is in the foothills of the Alps and is largely mountainous, the major mountains include, Massif des Maures and Massif de lEsterel, along the coast, are made of quartz rock. The Sainte-Baume mountain ridge, which lies in the west, mountain of Lachens, in the northwest of the department, and the highest point in the Var. The Plateau of Canjuers is located in the northeast of the Var, in the south and west there are several plateaus, such as the plateau of Siou Blanc to the north of Toulon, which rise from 400 to 700 metres in altitude. The Canyon du Verdon, the gorges of the Verdon River, is a place for hikers, kayakers. The Îles dHyères is a group of three islands off Hyères The islands are named Porquerolles, Port-Cros, and Île du Levant, together, they make up an area of 26 km2
5.
United States dollar
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The United States dollar is the official currency of the United States and its insular territories per the United States Constitution. It is divided into 100 smaller cent units, the circulating paper money consists of Federal Reserve Notes that are denominated in United States dollars. The U. S. dollar was originally commodity money of silver as enacted by the Coinage Act of 1792 which determined the dollar to be 371 4/16 grain pure or 416 grain standard silver, the currency most used in international transactions, it is the worlds primary reserve currency. Several countries use it as their currency, and in many others it is the de facto currency. Besides the United States, it is used as the sole currency in two British Overseas Territories in the Caribbean, the British Virgin Islands and Turks and Caicos Islands. A few countries use the Federal Reserve Notes for paper money, while the country mints its own coins, or also accepts U. S. coins that can be used as payment in U. S. dollars. After Nixon shock of 1971, USD became fiat currency, Article I, Section 8 of the U. S. Constitution provides that the Congress has the power To coin money, laws implementing this power are currently codified at 31 U. S. C. Section 5112 prescribes the forms in which the United States dollars should be issued and these coins are both designated in Section 5112 as legal tender in payment of debts. The Sacagawea dollar is one example of the copper alloy dollar, the pure silver dollar is known as the American Silver Eagle. Section 5112 also provides for the minting and issuance of other coins and these other coins are more fully described in Coins of the United States dollar. The Constitution provides that a regular Statement and Account of the Receipts and that provision of the Constitution is made specific by Section 331 of Title 31 of the United States Code. The sums of money reported in the Statements are currently being expressed in U. S. dollars, the U. S. dollar may therefore be described as the unit of account of the United States. The word dollar is one of the words in the first paragraph of Section 9 of Article I of the Constitution, there, dollars is a reference to the Spanish milled dollar, a coin that had a monetary value of 8 Spanish units of currency, or reales. In 1792 the U. S. Congress passed a Coinage Act, Section 20 of the act provided, That the money of account of the United States shall be expressed in dollars, or units. And that all accounts in the offices and all proceedings in the courts of the United States shall be kept and had in conformity to this regulation. In other words, this act designated the United States dollar as the unit of currency of the United States, unlike the Spanish milled dollar the U. S. dollar is based upon a decimal system of values. Both one-dollar coins and notes are produced today, although the form is significantly more common
6.
Dam
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A dam is a barrier that impounds water or underground streams. Reservoirs created by not only suppress floods but also provide water for activities such as irrigation, human consumption, industrial use, aquaculture. Hydropower is often used in conjunction with dams to generate electricity, a dam can also be used to collect water or for storage of water which can be evenly distributed between locations. Dams generally serve the purpose of retaining water, while other structures such as floodgates or levees are used to manage or prevent water flow into specific land regions. The word dam can be traced back to Middle English, and before that, from Middle Dutch, the first known appearance of dam occurs in 1165. However, there is one village, Obdam, that is mentioned in 1120. The word seems to be related to the Greek word taphos, so the word should be understood as dike from dug out earth. The names of more than 40 places from the Middle Dutch era such as Amsterdam and Rotterdam, early dam building took place in Mesopotamia and the Middle East. Dams were used to control the level, for Mesopotamias weather affected the Tigris. The earliest known dam is the Jawa Dam in Jordan,100 kilometres northeast of the capital Amman and this gravity dam featured an originally 9-metre-high and 1 m-wide stone wall, supported by a 50 m-wide earth rampart. The structure is dated to 3000 BC, the Ancient Egyptian Sadd-el-Kafara Dam at Wadi Al-Garawi, located about 25 km south of Cairo, was 102 m long at its base and 87 m wide. The structure was built around 2800 or 2600 BC as a dam for flood control. During the Twelfth Dynasty in the 19th century BC, the Pharaohs Senosert III, Amenemhat III, two dams called Ha-Uar running east-west were built to retain water during the annual flood and then release it to surrounding lands. The lake called Mer-wer or Lake Moeris covered 1,700 km2 and is today as Berkat Qaroun. One of the wonders of the ancient world was the Great Dam of Marib in Yemen. Repairs were carried out during various periods, most important around 750 BC and these extensive works were not actually finalized until 325 AD and allowed the irrigation of 25,000 acres. By the mid-late 3rd century BC, an intricate water-management system within Dholavira in modern-day India was built, the system included 16 reservoirs, dams and various channels for collecting water and storing it. Eflatun Pınar is a Hittite dam and spring temple near Konya and it is thought to be from the time of the Hittite empire between the 15th and 13th century BC
7.
Lithology
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It may be either a detailed description of these characteristics or be a summary of the gross physical character of a rock. It is the basis of subdividing rock sequences into individual lithostratigraphic units for the purposes of mapping, in certain applications, such as site investigations, lithology is described using a standard terminology such as in the European geotechnical standard Eurocode 7. The naming of a lithology is based on the rock type, the three major rock types are sedimentary, igneous, metamorphic. Sedimentary rocks are classified by whether they are siliciclastic or carbonate. Siliciclastic sedimentary rocks are then subcategorized based on their size distribution and the relative proportions of quartz, feldspar. Carbonate rocks are classified with the Dunham or Folk classification schemes according to the constituents of the carbonate rock, the name of an igneous rock requires information on crystal size and mineralogy. This classification can often be performed with a QAPF diagram, metamorphic rock naming can be based on texture, protolith, metamorphic facies, and/or the locations in which they are found. Naming based on texture and a pelite protolith can be used to slate and phyllite. Texture-based names are schist and gneiss and these textures, from slate to gneiss, define a continually-increasing extent of metamorphism. Metamorphic facies are defined by the fields in which particular minerals form. In igneous and metamorphic rocks, grain size is a measure of the sizes of the crystals in the rock. In igneous rock, this is used to determine the rate at which the material cooled, large crystals typically indicate intrusive igneous rock, as metamorphic reactions progress, the grains in metamorphic rocks can often be broken down into smaller grains. In clastic sedimentary rocks, grain size is the diameter of the grains and/or clasts that constitute the rock and these are used to determine which rock naming system to use. In the case of sandstones and conglomerates, which cover a range of grain sizes. Examples are pebble conglomerate and fine quartz arenite, in rocks in which mineral grains are large enough to be identified using a hand lens, the visible mineralogy is included as part of the description. The mineralogical composition of a rock is one of the ways in which it is classified. In general, igneous rocks can be categorized by increasing silica content as ultramafic, mafic, intermediate, or felsic, the fabric of a rock describes the spatial and geometric configuration of all the elements that make it up. In sedimentary rocks the main fabric is normally bedding and the scale
8.
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
9.
Gneiss
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Gneiss is a common distributed type of rock formed by high-grade regional metamorphic processes from pre-existing formations that were originally either igneous or sedimentary rocks. The foliations are characterized by alternating darker and lighter colored bands, the word gneiss comes from the Middle High German verb gneist. It has occurred in English since at least 1757, gneissic rocks are usually medium- to coarse-foliated, they are largely recrystallized but do not carry large quantities of micas, chlorite or other platy minerals. Gneisses that are metamorphosed igneous rocks or their equivalent are termed granite gneisses, diorite gneisses, gneiss rocks may also be named after a characteristic component such as garnet gneiss, biotite gneiss, albite gneiss, etc. Orthogneiss designates a gneiss derived from a rock, and paragneiss is one from a sedimentary rock. Gneissose rocks have properties similar to gneiss, gneiss appears to be striped in bands, called gneissic banding. The banding is developed under high temperature and pressure conditions, the minerals are arranged into layers that appear as bands in cross section. The appearance of layers, called compositional banding, occurs because the layers, the darker bands have relatively more mafic minerals. The lighter bands contain relatively more felsic and these forces stretch out the rock like a plastic, and the original material is spread out into sheets. Another cause of banding is metamorphic differentiation, which separates different materials into different layers through chemical reactions, not all gneiss rocks have detectable banding. In kyanite gneiss, crystals of kyanite appear as random clumps in what is mainly a plagioclase matrix, henderson gneiss is found in North Carolina and South Carolina, US, east of the Brevard Shear Zone. It has deformed into two sequential forms, the second, more warped, form is associated with the Brevard Fault, and the first deformation results from displacement to the southwest. Most of the Outer Hebrides of Scotland have a formed from Lewisian gneiss. In addition to the Outer Hebrides, they form basement deposits on the Scottish mainland west of the Moine Thrust and on the islands of Coll and Tiree. These rocks are igneous in origin, mixed with metamorphosed marble, quartzite and mica schist with later intrusions of basaltic dikes. Gneisses of Archean and Proterozoic age occur in the Baltic Shield, in antiquity, gneisses were also utilized in architectural construction. They were used to erect the Sphinx of Taharqo in the Nile Valley, list of rock types Blatt, Harvey and Robert J. Tracy. Petrology, Igneous, Sedimentary and Metamorphic, 2nd ed. Freeman, mcKirdy, Alan, Roger Crofts and John Gordon
