The Nature of Ancient History Flashcards
Stratigraphic Dating
A relative dating method.
The study of soil layers (stratum/strata) being excavated based on the rule of superposition: the deeper, the older.
Typography Dating
A relative dating method.
The comparing of an object type over time, ordering them chronologically based on changes in features/style.
Includes the Three-Age system, which dictates that stone is older than bronze which is older than iron.
Seriation Dating
Radiocarbon Dating
An absolute dating method.
The dating of an artefact in relation to the amount of carbon-14 that has decayed from the organic specimen at its steady rate.
Includes accelerator mass spectrometry (AMS dating), which is more accurate, requires less specimen and dates up to 70 000 years ago.
Dendrochronology
An absolute dating method.
The practice of measuring age based on the growth rings of a tree on wooden artefacts.
Potassium-Argon Dating
An absolute dating method.
Dates volcanic rocks and fossils by…
Fission Track Dating
An absolute dating method.
The method of dating the thermal age of uranium-bearing minerals in artefacts.
Thermoluminescence
An absolute dating method.
The dating of ceramic objects by reheating it and measuring the radiation released by the minerals, which has built up over time since the artefact was originally fired.
Crop Marks
Aerial Survey
Crops display differences depending on whether they have something buried beneath them, often ripening later and growing taller, but this is only observable from above.
Soil Marks
Aerial Survey
After a field has been ploughed, soil may be darker where a ditch, pit or mound was, exposing buried features.
Shadow Marks
Aerial Survey
Abnormal mounds become noticeable with the presence of sunlight from the shadows cast when the sun is low.
Satellite Photography
Aerial Survey
A more efficient method of aerial surveying as it covers more than 200 times the area at once.
Field Walking
Surveying Techniques
Simple observation is one of the first steps once an area has been identified, used to note any surface finds which are then plotted on a map by coordinates.
Ground Penetrating Radar (GPR)
Surveying Techniques: Geophysical Survey
An electromagnetic pulse is sent into the ground and reflections from buried objects are received for data on a profile map.
Resistivity Surveying
Surveying Techniques: Geophysical Survey
A resistivity meter consisting of two buried metal probes and the current between them measures the resistance of the soil.
Magnetic Surveying
Surveying Techniques: Geophysical Survey
A proton magnometer detects subsurface materials based on magnetism.
Grid System
Methods of Excavation
The site is divided into a grid to be excavated, exposing layers of strata, which can be used to indicate age of artefacts and recorded according to the coordinates of the grid.
Open Area Excavation
Methods of Excavation
Now more common than grid system.
It focuses on the horizontal dimension by uncovering each individual layer and emphasising the relationship between sources within.
Climate
Preservation of Evidence
Dry climates create an absence of moisture, preventing natural decay (e.g. Egypt).
Temperate regions preserve evidence under layers of silt in areas like lakes and rivers (e.g. Lindow Man).
Cold climates freeze and prevent natural decay (e.g. Otzi the Iceman).
Geological Conditions
Preservation of Evidence
The composition of soil in some areas may react with evidence to preserve it, such as minerals preventing organic decay or layers of ash encasing it (e.g. Pompeii).
Actions of People
Preservation of Evidence
Deliberate preservation are actions humans actively take to prevent the degradation of evidence.
Accidental preservation in preserving their heritage by having burial customs, allowing artefacts to be rediscovered, or carbonising their own artefacts with fire.
Rediscovery of Evidence
Preservation of Evidence
Archaeologists actively attempt to rediscover artefacts while occasionally, they are simply found. An example of this is with wartime hoards — such as one in 1992 Hoxne, England where a stash was hidden during the Anglo-Saxon invasion.
Natural Environment
Destruction of Evidence
Climate change, natural disasters and weathering effects cause immense loss in the present and past by destroying evidence.
Plants can cause damage, such as in Angkor, Cambodia, where tree roots destroyed ancient ruins.
Animals can cause damage, such as termites eating into wooden artefacts.
Human Agents
Destruction of Evidence
Warfare is the worst example of human destructiveness, accompanied by looting and damage (e.g. Taliban dynamiting of Afghanistan’s Bamiyan Buddhas in 2001).
Tourism causes mass crowds to cause damage to archaeological sites through mere interaction.
Development in trying a provide for modern needs struggles to coexist with historical preservation.
Various forms of pollution cause damage, in particular air pollution, which can cause corrosive acid rain (e.g. Athenian Acropolis), and ground pollution.