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Here is a survey on a site near Oxford. Like most Iron Age sites on Thames gravels it responds well to magnetometry.

It is good that this technique enables one to be fairly certain that the entirety of the settlement has been identified.

The site has some 3 or 4 presumably Iron age houses, associated paddocks, and is surrounded by presumably medieval ridge and furrow. There is a possible medieval track crossing the area and here are other, presumably Bronze Age features.

The ridge and furrow appears more pronounced near the settlement. This is probably because the earlier occupation will have had fires which will have enhanced the magnetic qualities of the soil in that area.

Grids 30metres square

                Magnetometer survey of Iron Age village

               Magnetometry survey of Iron Age farmstead and other features near Oxford