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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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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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SITE *
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Unclassifiable site with minimal information. Specify site type wherever possible.
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RECTILINEAR ENCLOSURE *
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A monument consisting of an area of land enclosed by a ditch, bank, wall, palisade or similar barrier, where the barrier consists of several straight or near straight sections.
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RECTANGULAR ENCLOSURE *
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A rectangular shaped area of land enclosed by a boundary ditch, bank, wall, palisade or similar barrier.
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CASTLE *
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A fortress and dwelling, usually medieval in origin, and often consisting of a keep, curtain wall and towers etc.
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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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* Copyright of English Heritage (1999)
