Geophysical Survey at Land at Needles Hall Farm, Brackley Hatch, Brackley, Northamptonshire

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 results that have been interpreted as being of archaeological interest. In the east of Area 1 a complex of magnetic responses has been detected comprising numerous enclosures and ditches. Amongst these responses are possible ring-ditches, pits and a tentative small oven or kiln. A further tentative sub-rectangular enclosure has also been marked in the east of Area 4. Other ditch-like responses are visible across the survey which may also be of interest. Magnetically weak linear and curvilinear trends have been marked in the data which are probably due to natural or agricultural processes. Ploughing trends are visible in Area 4 and three former field boundaries have been detected in Area 1. Bands of amorphous increased response have been caused by weathering or variations in the underlying limestone geology.