1.
Archaeology
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Archaeology, or archeology, is the study of human activity through the recovery and analysis of material culture. The archaeological record consists of artifacts, architecture, biofacts or ecofacts, Archaeology can be considered both a social science and a branch of the humanities. In North America, archaeology is considered a sub-field of anthropology, archaeologists study human prehistory and history, from the development of the first stone tools at Lomekwi in East Africa 3.3 million years ago up until recent decades. Archaeology as a field is distinct from the discipline of palaeontology, Archaeology is particularly important for learning about prehistoric societies, for whom there may be no written records to study. Prehistory includes over 99% of the human past, from the Paleolithic until the advent of literacy in societies across the world, Archaeology has various goals, which range from understanding culture history to reconstructing past lifeways to documenting and explaining changes in human societies through time. The discipline involves surveying, excavation and eventually analysis of data collected to learn more about the past, in broad scope, archaeology relies on cross-disciplinary research. Archaeology developed out of antiquarianism in Europe during the 19th century, Archaeology has been used by nation-states to create particular visions of the past. Nonetheless, today, archaeologists face many problems, such as dealing with pseudoarchaeology, the looting of artifacts, a lack of public interest, the science of archaeology grew out of the older multi-disciplinary study known as antiquarianism. Antiquarians studied history with attention to ancient artifacts and manuscripts. Tentative steps towards the systematization of archaeology as a science took place during the Enlightenment era in Europe in the 17th and 18th centuries, in Europe, philosophical interest in the remains of Greco-Roman civilization and the rediscovery of classical culture began in the late Middle Age. Antiquarians, including John Leland and William Camden, conducted surveys of the English countryside, one of the first sites to undergo archaeological excavation was Stonehenge and other megalithic monuments in England. John Aubrey was a pioneer archaeologist who recorded numerous megalithic and other monuments in southern England. He was also ahead of his time in the analysis of his findings and he attempted to chart the chronological stylistic evolution of handwriting, medieval architecture, costume, and shield-shapes. Excavations were also carried out in the ancient towns of Pompeii and Herculaneum and these excavations began in 1748 in Pompeii, while in Herculaneum they began in 1738. The discovery of entire towns, complete with utensils and even human shapes, however, prior to the development of modern techniques, excavations tended to be haphazard, the importance of concepts such as stratification and context were overlooked. The father of archaeological excavation was William Cunnington and he undertook excavations in Wiltshire from around 1798, funded by Sir Richard Colt Hoare. Cunnington made meticulous recordings of neolithic and Bronze Age barrows, one of the major achievements of 19th century archaeology was the development of stratigraphy. The idea of overlapping strata tracing back to successive periods was borrowed from the new geological and paleontological work of scholars like William Smith, James Hutton, the application of stratigraphy to archaeology first took place with the excavations of prehistorical and Bronze Age sites
2.
Excavation (archaeology)
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In archaeology, excavation is the exposure, processing and recording of archaeological remains. An excavation site or dig is a site being studied, such a site excavation concerns itself with a specific archaeological site or a connected series of sites, and may be conducted over as little as several weeks to over a number of years. Numerous specialized techniques each with its features are used. Resources and other practical issues do not allow archaeologists to carry out excavations whenever and wherever they choose and these constraints mean many known sites have been deliberately left unexcavated. This is with the intention of preserving them for generations as well as recognising the role they serve in the communities that live near them. Excavation involves the recovery of types of data from a site. These data include artifacts, features, ecofacts and, most importantly, ideally, data from the excavation should suffice to reconstruct the site completely in three-dimensional space. The presence or absence of remains can often be suggested by remote sensing. Indeed, grosser information about the development of the site may be drawn from this work, the history of excavation began with a crude search for treasure and for artifacts which fell into the category of curio. These curios were the subject of interest of antiquarians and it was later appreciated that digging on a site destroyed the evidence of earlier peoples lives which it had contained. Once the curio had been removed from its context, most of the information it held was lost and it was from this realization that antiquarianism began to be replaced by archaeology, a process still being perfected. Archaeological material tends to accumulate in events, a gardener swept a pile of soil into a corner, laid a gravel path or planted a bush in a hole. A builder built a wall and back-filled the trench, years later, someone built a pig sty onto it and drained the pig sty into the nettle patch. Later still, the original wall blew over and so on, each event, which may have taken a short or long time to accomplish, leaves a context. This layer cake of events is referred to as the archaeological sequence or record. It is by analysis of sequence or record that excavation is intended to permit interpretation. As he remarked, waiting for animals to hunt represented 24% of the total man-hours of activity recorded, no tools left on the site were used, and there were no immediate material byproducts of the primary activity. All of the activities conducted at the site were essentially boredom reducers
3.
Stratigraphy
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Stratigraphy is a branch of geology which studies rock layers and layering. It is primarily used in the study of sedimentary and layered volcanic rocks, stratigraphy has two related subfields, lithologic stratigraphy or lithostratigraphy, and biologic stratigraphy or biostratigraphy. The first practical application of stratigraphy was by William Smith in the 1790s. Another influential application of stratigraphy in the early 19th century was a study by Georges Cuvier, variation in rock units, most obviously displayed as visible layering, is due to physical contrasts in rock type. This variation can occur vertically as layering, or laterally, and these variations provide a lithostratigraphy or lithologic stratigraphy of the rock unit. Key concepts in stratigraphy involve understanding how certain geometric relationships between rock layers arise and what these geometries imply about their original depositional environment. The basic concept in stratigraphy, called the law of superposition, states, in a stratigraphic sequence. Chemostratigraphy studies the changes in the proportions of trace elements and isotopes within. Carbon and oxygen isotope ratios vary with time, and researchers can use those to map subtle changes that occurred in the paleoenvironment and this has led to the specialized field of isotopic stratigraphy. Biostratigraphy or paleontologic stratigraphy is based on evidence in the rock layers. Strata from widespread locations containing the fossil fauna and flora are said to be correlatable in time. Biologic stratigraphy was based on William Smiths principle of succession, which predated. It provides strong evidence for the formation and extinction of species, the geologic time scale was developed during the 19th century, based on the evidence of biologic stratigraphy and faunal succession. One important development is the Vail curve, which attempts to define a global historical sea-level curve according to inferences from worldwide stratigraphic patterns, stratigraphy is also commonly used to delineate the nature and extent of hydrocarbon-bearing reservoir rocks, seals, and traps of petroleum geology. Chronostratigraphy is the branch of stratigraphy that places an absolute age, a gap or missing strata in the geological record of an area is called a stratigraphic hiatus. This may be the result of a halt in the deposition of sediment, alternatively, the gap may be due to removal by erosion, in which case it may be called a stratigraphic vacuity. It is called a hiatus because deposition was on hold for a period of time, a physical gap may represent both a period of non-deposition and a period of erosion. A geologic fault may cause the appearance of a hiatus, magnetostratigraphy is a chronostratigraphic technique used to date sedimentary and volcanic sequences
4.
Erosion
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In earth science, erosion is the action of surface processes that remove soil, rock, or dissolved material from one location on the Earths crust, then transport it away to another location. Eroded sediment or solutes may be transported just a few millimetres, the rates at which such processes act control how fast a surface is eroded. Feedbacks are also possible between rates of erosion and the amount of eroded material that is carried by, for example. Processes of erosion that produce sediment or solutes from a place contrast with those of deposition, while erosion is a natural process, human activities have increased by 10-40 times the rate at which erosion is occurring globally. At well-known agriculture sites such as the Appalachian Mountains, intensive farming practices have caused erosion up to 100x the speed of the rate of erosion in the region. Excessive erosion causes both on-site and off-site problems, on-site impacts include decreases in agricultural productivity and ecological collapse, both because of loss of the nutrient-rich upper soil layers. In some cases, the end result is desertification. Off-site effects include sedimentation of waterways and eutrophication of bodies, as well as sediment-related damage to roads. Intensive agriculture, deforestation, roads, anthropogenic climate change and urban sprawl are amongst the most significant human activities in regard to their effect on stimulating erosion, however, there are many prevention and remediation practices that can curtail or limit erosion of vulnerable soils. Rainfall, and the surface runoff which may result from rainfall, produces four types of soil erosion, splash erosion, sheet erosion, rill erosion. Splash erosion is generally seen as the first and least severe stage in the erosion process. In splash erosion, the impact of a falling raindrop creates a crater in the soil. The distance these soil particles travel can be as much as 0.6 m vertically and 1.5 m horizontally on level ground. If the soil is saturated, or if the rate is greater than the rate at which water can infiltrate into the soil. If the runoff has sufficient flow energy, it will transport loosened soil particles down the slope, sheet erosion is the transport of loosened soil particles by overland flow. Rill erosion refers to the development of small, ephemeral concentrated flow paths which function as both sediment source and sediment delivery systems for erosion on hillslopes, generally, where water erosion rates on disturbed upland areas are greatest, rills are active. Flow depths in rills are typically of the order of a few centimetres or less and this means that rills exhibit hydraulic physics very different from water flowing through the deeper, wider channels of streams and rivers. Gully erosion occurs when water accumulates and rapidly flows in narrow channels during or immediately after heavy rains or melting snow
5.
Astronomy
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Astronomy is a natural science that studies celestial objects and phenomena. It applies mathematics, physics, and chemistry, in an effort to explain the origin of those objects and phenomena and their evolution. Objects of interest include planets, moons, stars, galaxies, and comets, while the phenomena include supernovae explosions, gamma ray bursts, more generally, all astronomical phenomena that originate outside Earths atmosphere are within the purview of astronomy. A related but distinct subject, physical cosmology, is concerned with the study of the Universe as a whole, Astronomy is the oldest of the natural sciences. The early civilizations in recorded history, such as the Babylonians, Greeks, Indians, Egyptians, Nubians, Iranians, Chinese, during the 20th century, the field of professional astronomy split into observational and theoretical branches. Observational astronomy is focused on acquiring data from observations of astronomical objects, theoretical astronomy is oriented toward the development of computer or analytical models to describe astronomical objects and phenomena. The two fields complement each other, with theoretical astronomy seeking to explain the results and observations being used to confirm theoretical results. Astronomy is one of the few sciences where amateurs can play an active role, especially in the discovery. Amateur astronomers have made and contributed to many important astronomical discoveries, Astronomy means law of the stars. Astronomy should not be confused with astrology, the system which claims that human affairs are correlated with the positions of celestial objects. Although the two share a common origin, they are now entirely distinct. Generally, either the term astronomy or astrophysics may be used to refer to this subject, however, since most modern astronomical research deals with subjects related to physics, modern astronomy could actually be called astrophysics. Few fields, such as astrometry, are purely astronomy rather than also astrophysics, some titles of the leading scientific journals in this field includeThe Astronomical Journal, The Astrophysical Journal and Astronomy and Astrophysics. In early times, astronomy only comprised the observation and predictions of the motions of objects visible to the naked eye, in some locations, early cultures assembled massive artifacts that possibly had some astronomical purpose. Before tools such as the telescope were invented, early study of the stars was conducted using the naked eye, most of early astronomy actually consisted of mapping the positions of the stars and planets, a science now referred to as astrometry. From these observations, early ideas about the motions of the planets were formed, and the nature of the Sun, Moon, the Earth was believed to be the center of the Universe with the Sun, the Moon and the stars rotating around it. This is known as the model of the Universe, or the Ptolemaic system. The Babylonians discovered that lunar eclipses recurred in a cycle known as a saros
6.
History
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History is the study of the past as it is described in written documents. Events occurring before written record are considered prehistory and it is an umbrella term that relates to past events as well as the memory, discovery, collection, organization, presentation, and interpretation of information about these events. Scholars who write about history are called historians and their works continue to be read today, and the gap between the culture-focused Herodotus and the military-focused Thucydides remains a point of contention or approach in modern historical writing. In Asia, a chronicle, the Spring and Autumn Annals was known to be compiled from as early as 722 BC although only 2nd-century BC texts survived. Ancient influences have helped spawn variant interpretations of the nature of history which have evolved over the centuries, the modern study of history is wide-ranging, and includes the study of specific regions and the study of certain topical or thematical elements of historical investigation. Often history is taught as part of primary and secondary education, the word history comes ultimately from Ancient Greek ἱστορία, meaning inquiry, knowledge from inquiry, or judge. It was in that sense that Aristotle used the word in his Περὶ Τὰ Ζῷα Ἱστορίαι, the ancestor word ἵστωρ is attested early on in Homeric Hymns, Heraclitus, the Athenian ephebes oath, and in Boiotic inscriptions. History was borrowed from Latin into Old English as stær, and it was from Anglo-Norman that history was borrowed into Middle English, and this time the loan stuck. In Middle English, the meaning of history was story in general, the restriction to the meaning the branch of knowledge that deals with past events, the formal record or study of past events, esp. human affairs arose in the mid-fifteenth century. With the Renaissance, older senses of the word were revived, and it was in the Greek sense that Francis Bacon used the term in the sixteenth century. For him, historia was the knowledge of objects determined by space and time, in an expression of the linguistic synthetic vs. analytic/isolating dichotomy, English like Chinese now designates separate words for human history and storytelling in general. In modern German, French, and most Germanic and Romance languages, which are synthetic and highly inflected. The adjective historical is attested from 1661, and historic from 1669, Historian in the sense of a researcher of history is attested from 1531. Historians write in the context of their own time, and with due regard to the current dominant ideas of how to interpret the past, in the words of Benedetto Croce, All history is contemporary history. History is facilitated by the formation of a discourse of past through the production of narrative. The modern discipline of history is dedicated to the production of this discourse. All events that are remembered and preserved in some authentic form constitute the historical record, the task of historical discourse is to identify the sources which can most usefully contribute to the production of accurate accounts of past. Therefore, the constitution of the archive is a result of circumscribing a more general archive by invalidating the usage of certain texts and documents
7.
Paleontology
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Paleontology or palaeontology is the scientific study of life that existed prior to, and sometimes including, the start of the Holocene Epoch. It includes the study of fossils to determine organisms evolution and interactions with each other, paleontological observations have been documented as far back as the 5th century BC. The science became established in the 18th century as a result of Georges Cuviers work on comparative anatomy, and developed rapidly in the 19th century. The term itself originates from Greek παλαιός, palaios, i. e. old, ancient, ὄν, on, i. e. being, creature and λόγος, logos, i. e. speech, thought, study. Paleontology lies on the border between biology and geology, but differs from archaeology in that it excludes the study of modern humans. It now uses techniques drawn from a range of sciences, including biochemistry, mathematics. The final quarter of the 20th century saw the development of molecular phylogenetics, molecular phylogenetics has also been used to estimate the dates when species diverged, but there is controversy about the reliability of the molecular clock on which such estimates depend. The simplest definition is the study of ancient life, paleontology is one of the historical sciences, along with archaeology, geology, astronomy, cosmology, philology and history itself. This means that it aims to describe phenomena of the past, hence it has three main elements, description of the phenomena, developing a general theory about the causes of various types of change, and applying those theories to specific facts. Sometimes the smoking gun is discovered by an accident during other research. Paleontology lies on the boundary between biology and geology since paleontology focuses on the record of past life but its source of evidence is fossils. In addition paleontology often uses techniques derived from other sciences, including biology, osteology, ecology, chemistry, techniques developed in engineering have been used to analyse how ancient organisms might have worked, for example how fast Tyrannosaurus could move and how powerful its bite was. As knowledge has increased, paleontology has developed specialised subdivisions, vertebrate paleontology concentrates on fossils of vertebrates, from the earliest fish to the immediate ancestors of modern mammals. Invertebrate paleontology deals with fossils of such as molluscs, arthropods. Paleobotany focuses on the study of plants, but traditionally includes the study of fossil algae. Palynology, the study of pollen and spores produced by plants and protists. Micropaleontology deals with all microscopic fossil organisms, regardless of the group to which they belong, one example is the development of oxygenic photosynthesis by bacteria, which hugely increased the productivity and diversity of ecosystems. This also caused the oxygenation of the atmosphere, together, these were a prerequisite for the evolution of the most complex eukaryotic cells, from which all multicellular organisms are built
8.
Time
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Time is the indefinite continued progress of existence and events that occur in apparently irreversible succession from the past through the present to the future. Time is often referred to as the dimension, along with the three spatial dimensions. Time has long been an important subject of study in religion, philosophy, and science, nevertheless, diverse fields such as business, industry, sports, the sciences, and the performing arts all incorporate some notion of time into their respective measuring systems. Two contrasting viewpoints on time divide prominent philosophers, one view is that time is part of the fundamental structure of the universe—a dimension independent of events, in which events occur in sequence. Isaac Newton subscribed to this realist view, and hence it is referred to as Newtonian time. This second view, in the tradition of Gottfried Leibniz and Immanuel Kant, holds that time is neither an event nor a thing, Time in physics is unambiguously operationally defined as what a clock reads. Time is one of the seven fundamental physical quantities in both the International System of Units and International System of Quantities, Time is used to define other quantities—such as velocity—so defining time in terms of such quantities would result in circularity of definition. The operational definition leaves aside the question there is something called time, apart from the counting activity just mentioned, that flows. Investigations of a single continuum called spacetime bring questions about space into questions about time, questions that have their roots in the works of early students of natural philosophy. Furthermore, it may be there is a subjective component to time. Temporal measurement has occupied scientists and technologists, and was a motivation in navigation. Periodic events and periodic motion have long served as standards for units of time, examples include the apparent motion of the sun across the sky, the phases of the moon, the swing of a pendulum, and the beat of a heart. Currently, the unit of time, the second, is defined by measuring the electronic transition frequency of caesium atoms. Time is also of significant social importance, having economic value as well as value, due to an awareness of the limited time in each day. In day-to-day life, the clock is consulted for periods less than a day whereas the calendar is consulted for periods longer than a day, increasingly, personal electronic devices display both calendars and clocks simultaneously. The number that marks the occurrence of an event as to hour or date is obtained by counting from a fiducial epoch—a central reference point. Artifacts from the Paleolithic suggest that the moon was used to time as early as 6,000 years ago. Lunar calendars were among the first to appear, either 12 or 13 lunar months, without intercalation to add days or months to some years, seasons quickly drift in a calendar based solely on twelve lunar months
9.
West Sussex
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West Sussex is a county in the south of England, bordering East Sussex to the east, Hampshire to the west and Surrey to the north, and to the south the English Channel. Chichester in the southwest is the county town and only city in West Sussex, with the largest towns being Crawley, Worthing, West Sussex has a range of scenery, including wealden, downland and coastal. The highest point of the county is Blackdown, at 280 metres and it has a number of stately homes including Goodwood, Petworth House and Uppark and also castles such as Arundel Castle and Bramber Castle. Over half the county is protected countryside, offering walking, cycling, although the name Sussex, derived from the Old English Sūþsēaxe, is from the Saxon period between AD477 to 1066, the history of human habitation in Sussex goes back to the Old Stone Age. The oldest hominin remains known in Britain were found at Eartham Pit, Sussex has been occupied since those times and has succumbed to various invasions and migrations throughout its long history. Prehistoric monuments include the Devils Jumps, a group of Bronze Age burial mounds, the Romans used the Weald for iron production on an industrial scale. The foundation story is regarded as somewhat of a myth by most historians, the Kingdom of Sussex was absorbed into Wessex as an earldom and became the county of Sussex. With its origins in the kingdom of Sussex, the county of Sussex was traditionally divided into six units known as rapes. By the 16th century, the three western rapes were grouped together informally, having their own separate Quarter Sessions and these were administered by a separate county council from 1888, the county of Sussex being divided for administrative purposes into the administrative counties of East and West Sussex. In 1974, West Sussex was made a ceremonial county with the coming into force of the Local Government Act 1972. At the same time a part of the eastern rape of Lewes was transferred into West Sussex. Until 1834 provision for the poor and destitute in West Sussex was made at parish level, from 1835 until 1948 eleven Poor Law Unions, each catering for several parishes, took on the job. Most settlements in West Sussex are either along the south coast or in Mid Sussex, the town of Crawley is the largest in the county with an estimated population of 106,600. The coastal settlement of Worthing closely follows with a population of 104,600, the seaside resort of Bognor Regis and market town Horsham are both large towns. Chichester, the county town, has a cathedral and city status, much of the coastal town population is part of the Brighton/Worthing/Littlehampton conurbation. Rustington and Southwater are the next largest settlements in the county, there are several more towns in West Sussex, although they are of similar size to other villages. The smaller towns of the county are Arundel, Midhurst, Petworth, Selsey, the larger villages are Billingshurst, Copthorne, Crawley Down, Cuckfield, Henfield, Hassocks, Hurstpierpoint, Lindfield, Pulborough and Storrington. The current total population of the county makes up 1. 53% of Englands population, West Sussex is bordered by Hampshire to the west, Surrey to the north and East Sussex to the east
10.
Athens
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Athens is the capital and largest city of Greece. In modern times, Athens is a cosmopolitan metropolis and central to economic, financial, industrial, maritime. In 2015, Athens was ranked the worlds 29th richest city by purchasing power, Athens is recognised as a global city because of its location and its importance in shipping, finance, commerce, media, entertainment, arts, international trade, culture, education and tourism. It is one of the biggest economic centres in southeastern Europe, with a financial sector. The municipality of Athens had a population of 664,046 within its limits. The urban area of Athens extends beyond its administrative city limits. According to Eurostat in 2011, the Functional urban areas of Athens was the 9th most populous FUA in the European Union, Athens is also the southernmost capital on the European mainland. The city also retains Roman and Byzantine monuments, as well as a number of Ottoman monuments. Athens is home to two UNESCO World Heritage Sites, the Acropolis of Athens and the medieval Daphni Monastery, Athens was the host city of the first modern-day Olympic Games in 1896, and 108 years later it welcomed home the 2004 Summer Olympics. In Ancient Greek, the name of the city was Ἀθῆναι a plural, in earlier Greek, such as Homeric Greek, the name had been current in the singular form though, as Ἀθήνη. It was possibly rendered in the later on, like those of Θῆβαι and Μυκῆναι. During the medieval period the name of the city was rendered once again in the singular as Ἀθήνα, an etiological myth explaining how Athens has acquired its name was well known among ancient Athenians and even became the theme of the sculpture on the West pediment of the Parthenon. The goddess of wisdom, Athena, and the god of the seas, Poseidon had many disagreements, in an attempt to compel the people, Poseidon created a salt water spring by striking the ground with his trident, symbolizing naval power. However, when Athena created the tree, symbolizing peace and prosperity. Different etymologies, now rejected, were proposed during the 19th century. Christian Lobeck proposed as the root of the name the word ἄθος or ἄνθος meaning flower, ludwig von Döderlein proposed the stem of the verb θάω, stem θη- to denote Athens as having fertile soil. In classical literature, the city was referred to as the City of the Violet Crown, first documented in Pindars ἰοστέφανοι Ἀθᾶναι. In medieval texts, variant names include Setines, Satine, and Astines, today the caption η πρωτεύουσα, the capital, has become somewhat common
11.
Geology
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Geology is an earth science concerned with the solid Earth, the rocks of which it is composed, and the processes by which they change over time. Geology can also refer generally to the study of the features of any terrestrial planet. Geology gives insight into the history of the Earth by providing the evidence for plate tectonics, the evolutionary history of life. Geology also plays a role in engineering and is a major academic discipline. The majority of data comes from research on solid Earth materials. These typically fall into one of two categories, rock and unconsolidated material, the majority of research in geology is associated with the study of rock, as rock provides the primary record of the majority of the geologic history of the Earth. There are three types of rock, igneous, sedimentary, and metamorphic. The rock cycle is an important concept in geology which illustrates the relationships between three types of rock, and magma. When a rock crystallizes from melt, it is an igneous rock, the sedimentary rock can then be subsequently turned into a metamorphic rock due to heat and pressure and is then weathered, eroded, deposited, and lithified, ultimately becoming a sedimentary rock. Sedimentary rock may also be re-eroded and redeposited, and metamorphic rock may also undergo additional metamorphism, all three types of rocks may be re-melted, when this happens, a new magma is formed, from which an igneous rock may once again crystallize. Geologists also study unlithified material which typically comes from more recent deposits and these materials are superficial deposits which lie above the bedrock. Because of this, the study of material is often known as Quaternary geology. This includes the study of sediment and soils, including studies in geomorphology, sedimentology and this theory is supported by several types of observations, including seafloor spreading, and the global distribution of mountain terrain and seismicity. This coupling between rigid plates moving on the surface of the Earth and the mantle is called plate tectonics. The development of plate tectonics provided a basis for many observations of the solid Earth. Long linear regions of geologic features could be explained as plate boundaries, mid-ocean ridges, high regions on the seafloor where hydrothermal vents and volcanoes exist, were explained as divergent boundaries, where two plates move apart. Arcs of volcanoes and earthquakes were explained as convergent boundaries, where one plate subducts under another, transform boundaries, such as the San Andreas Fault system, resulted in widespread powerful earthquakes. Plate tectonics also provided a mechanism for Alfred Wegeners theory of continental drift and they also provided a driving force for crustal deformation, and a new setting for the observations of structural geology
12.
Harris matrix
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The matrix reflects the relative position and stratigraphic contacts of observable stratigraphic units, or contexts. The Matrix was developed in 1973 in Winchester, England, by Dr. Edward C, in his Principles of archaeological stratigraphy Harris first proposed the need for each unit of stratification to have its own graphic representation, usually in the form of a measured plan. Any archaeological layer deposited in a form will tend towards a horizontal disposition. Strata which are found with tilted surfaces were so originally deposited, any archaeological deposit, as originally laid down, will be bounded by the edge of the basin of deposition, or will thin down to a feather edge. These laws were published in 1979, a fifth law of archaeological stratigraphy has also been added following papers presented at the Interpreting Stratigraphy a Review of the Art conferences in the UK from 1992 to 2003. In constructing a matrix, the latest contexts sit on top of the matrix, the matrix thus demonstrates the temporal relationship between any two units of archaeological stratification. While excavating, it is best practice to compile the area, urban archaeological sites are complex affairs, often generating thousands of units of archaeological stratigraphy. It is of more vital importance when excavating such sites to compile the matrix as the excavation progresses. This ensures a consistent record and that the complexity of the site is given due regard. Computer programmes do exist which can aid the production of a matrix, the Harris matrix is a tool that aids the accurate and consistent excavation of a site and articulates complex sequences in a clear and understandable way. Harris matrices play an role in the articulation of sequence. Take this hypothetical section as an example of matrix formation, the order in which these events occurred and the reverse order they should have been excavated with would be demonstrated by the following Harris matrix. The later a contexts formation is, the higher it is in the matrix, and conversely the earlier it is and this is because the formation of the backfill and floor happened later. Also note the matrix splits into two parts below the construction cut 5, however the position of cut 5 and natural layer 11 ties the matrix together above and below the split in the matrix. Starting at the bottom, the events occurred in this section is revealed by the matrix as follows. Natural ground formation 11 was followed by the laying down of layers 9 and 10 which probably occurred as the same event, then a shallow pit 8 was cut and then back filled with 7. This pit feature in turn was sealed by the laying down of layer 1 which is probably the event as layer 4. Finally clay floor 6 is laid down to the right of wall 2 over backfill 3 indicating a probable interior surface, the nature of archaeological investigation and the subjective nature of all human experience means that a degree of interpretive activity obviously occurs during the process of excavation
