A circular enclosure roughly ten metres across, defined by a fosse (a cut ditch in the earth), it exists at ground level only as a faint ghost in the soil, invisible to anyone walking past. It becomes legible only from the air, when the differential growth of crops above the buried ditch reveals its outline as a cropmark, the kind of faint circular trace that aerial photographers have learned to recognise as a signal worth recording.

Ring-ditches of this kind are generally understood to be the remains of prehistoric funerary or ceremonial monuments, the eroded remnants of round barrows or other circular earthworks whose above-ground features have long since been ploughed or weathered away. What survives is the ditch alone, cut deep enough into the subsoil that the soil above it retains slightly more moisture, causing the vegetation to grow fractionally differently and betray the outline beneath. This particular example was captured in aerial photographs taken on 2 August 1996, which fixed its location and approximate dimensions on record.