West Yorkshire Archaeology Advisory Service - The Romans in West Yorkshire
This aerial photograph shows the cropmark outline of an Iron Age/Romano-British farm at Ackton near Pontefract. Plants growing over buried ditches can still get water when other plants in the field dry out, in consequence they still remain green while the other plants turn yellow. Archaeologists use these differences in colour to trace the layout of buried features from the air.
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West Yorkshire Archaeology Service - The Romans in West Yorkshire
© WYJS 2005. The material on this information sheet may be reproduced free of copyright for educational purposes only.