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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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FOX COVERT *
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A small area of managed woodland, created to provide cover for foxes.
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SITE *
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Unclassifiable site with minimal information. Specify site type wherever possible.
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BOUNDARY *
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The limit to an area as defined on a map or by a marker of some form, eg. BOUNDARY WALL. Use specific type where known.
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FEATURE *
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Areas of indeterminate function.
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SQUARE ENCLOSURE *
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A square shaped area of land enclosed by a boundary ditch, bank, wall, palisade or similar barrier. Small square enclosures (with sides of less than c.20m) have been interpreted as the remains of square barrows of Iron Age date.
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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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DITCH *
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A long and narrow hollow or trench dug in the ground, often used to carry water though it may be dry for much of the year.
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SHEEP WASH *
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A place used to clean the fleece of sheep before shearing. This could be a watercourse temporarily dammed in order to wash sheep.
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* Copyright of English Heritage (1999)