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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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Prehistoric
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About 500,000 BC to 42 AD
The Prehistoric period covers all the periods from the Palaeolithic to the end of the Iron Age.
This is a time when people did not write anything down so there is no documentary evidence for archaeologists to look at. Instead, the archaeologists look at the material culture belonging to the people and the places where they lived for clues about their way of life.
The Prehistoric period is divided into the Early Prehistoric and Later Prehistoric.
The Early Prehistoric period covers the Palaeolithic and Mesolithic periods.
The Later Prehistoric period covers Neolithic, Bronze Age and Iron Age times.
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LAYER *
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An archaeological unit of soil in a horizontal plane which may seal features or be cut through by other features.
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LINEAR FEATURE *
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A length of straight, curved or angled earthwork or cropmark of uncertain date or function.
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ENCLOSURE *
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An area of land enclosed by a boundary ditch, bank, wall, palisade or other similar barrier. Use specific type where known.
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RING DITCH *
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Circular or near circular ditches, usually seen as cropmarks. Use the term where the function is unknown. Ring ditches may be the remains of ploughed out round barrows, round houses, or of modern features such as searchlight emplacements.
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FARM *
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A tract of land, often including a farmhouse and ancillary buildings, used for the purpose of cultivation and the rearing of livestock, etc. Use more specific type where known.
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* Copyright of English Heritage (1999)
