Geophysical Survey at Dollymans Farm, Wickford, Essex

Data was collected using a cart carrying four paired Bartington magnetic sensors. Four sensors mounted 1m horizontally apart and very accurately aligned to nullify the effects of the earth's magnetic field. Readings relate to the difference in localised magnetic anomalies compared with the general magnetic background. Each data point is geographically referenced using an on-board Trimble RTK survey grade GPS system. Readings were taken at 0.125m centres along traverses 1.0m apart. Readings relate to the difference in localised magnetic anomalies compared with the general magnetic background. The magnetometer survey has recorded magnetic responses that have been interpreted as being of possible archaeological interest. In the north of Area 20 there is a series of linear anomalies, some of which appear to form rectangular patterns; they could indicate the locations of ditches and enclosures. Responses of uncertain origin have also been marked across the survey which are probably due to natural or arable processes. Current field boundaries, former field boundaries, modern ploughing and land drains have all been mapped. Amorphous bands of increased response have been plotted which are a result of variations or weathering of the underlying geology. A former pylon base has been marked in the north-west of Area 1.