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EntityQ852811· pop 8· linked from 173 articles

Also known as crop-mark, crop mark

thumb|300px|right|Cropmarks at a protohistoric site at [[Grézac, France]]

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thumb|300px|right|Cropmarks at a protohistoric site at [[Grézac, France]]

Cropmarks or crop marks are a means through which sub-surface archaeological, natural and recent features may be visible from the air or a vantage point on higher ground or a temporary platform. Such marks, along with parch marks, soil marks and frost marks, can reveal buried man-made structures that are not visible from the ground.

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