When buried features such as ditches or banks affect how moisture is retained in the ground, the overlying crops grow at slightly different rates, and in the right season those differences become readable as patterns. This is how the south-western half of a once-complete enclosure has been recovered, surfacing briefly each summer in the geometry of a field.

What the cropmark reveals is the arc of a univallate enclosure, meaning one defined by a single bank or ditch rather than multiple concentric rings, broadly sub-circular in plan. Its sides run almost straight, meeting at rounded corners, which gives the whole a slightly softened rectangular quality rather than a true circle. The entrance faces towards the west-south-west and shows either slight inturns, where the terminals of the bank curve inward to form a narrowed approach, or expanded bank terminals, where the ends widen to frame the gap. These are details of construction that speak to deliberate design rather than casual land division, though without excavation it is difficult to say more about who built it or when.