Aerial Archaeol 4

Describes the equipment, procedure, problems, and potential improvements of a system using a Jalbert airfoil.

Describes the equipment required and mode of operation.

As a contribution to better understanding of crop marks, common crops are considered, especially cereals but also roots, pulses, and grass. Potential soil moisture deficit figures are given and the importance of the 100mm soil moisture deficit level or the Bunter sandstone soils of S Yorks and Notts is demonstrated, as is the need to gather soil data when crop marks are excavated. Au(adp)

Extended discussion of the aerial photographic evidence for a group of sixteen ditched camps, somewhat similar to British causewayed camps though probably not ancestral to them, in the area around the Marais poitevin. Comments on typology, function, and geographical setting are included; gazetteer.

Cautionary article illustrating by numerous examples that not all features produce crop marks and not all crop marks are correctly interpreted. See also W T Jones, same issue pp 84-6, on the cross trenches of a windmill.