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Cropmark
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Cropmarks appear as light and dark marks in growing and ripening crops. These marks relate to differences in the soil below. For example, parched lines of grass may indicate stone walls. Crops that grow over stone features often ripen more quickly and are shorter than the surrounding crop. This is because there is less moisture in the soil where the wall lies.
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excavation
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Archaeologists excavate sites so that they can find information and recover archaeological materials before they are destroyed by erosion, construction or changes in land-use.
Depending on how complicated and widespread the archaeological deposits are, excavation can be done by hand or with heavy machinery. Archaeologists may excavate a site in a number of ways; either by open area excavation, by digging a test pit or a trial trench. more ->
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Aerial Photograph
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Aerial photographs are taken during an aerial survey, which involves looking at the ground from above. It is usually easier to see cropmarks and earthworks when they are viewed from above. Aerial photographs help archaeologists to record what they see and to identify new sites. There are two kinds of aerial photographs; oblique and vertical.
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Iron Age
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About 800 BC to 43 AD
The Iron Age comes after the Bronze Age and before the Roman period. It is a time when people developed the skills and knowledge to work and use iron, hence the name ‘Iron Age’ which is given to this period. Iron is a much tougher and more durable metal than bronze but it also requires more skill to make objects from it. People continued to use bronze during this period. more ->
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GRANGE *
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An outlying farm or estate, usually belonging to a religious order or feudal lord. Specifically related to core buildings and structures associated with monastic land holding. Use specific term where known.
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SITE *
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Unclassifiable site with minimal information. Specify site type wherever possible.
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PIT *
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A hole or cavity in the ground, either natural or the result of excavation. Use more specific type where known.
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PIT ALIGNMENT *
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A single line, or pair of roughly parallel lines, of pits set at intervals along a common axis or series of axes. The pits are not thought to have held posts.
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QUARRY *
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An excavation from which stone for building and other functions, is obtained by cutting, blasting, etc.
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* Copyright of English Heritage (1999)