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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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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)