Magnetometry Survey at Grendon Road, Earls Barton, Northampton

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 at Grendon Road, Earls Barton has not identified any anomalies of definite archaeological interest, apart from former ridge and furrow cultivation, despite the existence of a deserted medieval village being recorded immediately to the east in the HER. Parallel linear anomalies have an uncertain origin; they appear to form a continuation of a feature identified in the NMP as being a palaeochannel, though they might just indicate a former holloway. Other linear, curvilinear and discrete anomalies also have an uncertain origin and could be archaeological, agricultural or natural. Two former field boundaries can be corroborated with historic Ordnance Survey maps, while modern plough effects and an underground service have also been detected.