Soil mark

Soil marks are differences in soil colour as a result of underlying archaeological features. They can be seen when a ploughed-out earthwork has left hard dry material of a former bank and damper wetter material from a former ditch. They can also occur when a feature has cut through the top soil to reveal underlying chalk. Soil marks typically become visible in ploughed or harrowed fields, usually where there are restricted periods before the crops grow.

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