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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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SITE *
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Unclassifiable site with minimal information. Specify site type wherever possible.
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FEATURE *
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Areas of indeterminate function.
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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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WINCH *
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A stationary hoisting machine consisting of a rotating drum around which a cable, rope or chain is attached.
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* Copyright of English Heritage (1999)