It shows up as a cropmark, a phenomenon where the buried remains of a ditch or bank affect the growth of whatever is planted above, causing subtle differences in colour and height that only become apparent in aerial or satellite imagery, particularly during dry spells when shallow-rooted crops over disturbed soil show stress more quickly than those over undisturbed ground.

The site was identified and reported by Simon Dowling, who spotted it on Google Earth imagery captured on 14 July 2018. What he observed is consistent with a ring-ditch, a type of monument generally understood to represent the remains of a prehistoric funerary or ceremonial enclosure. Ring-ditches are the ploughed-down remnants of burial mounds or circular earthworks whose upstanding banks and internal features have long since been levelled by centuries of agriculture, leaving only the cut of the original ditch as a trace in the subsoil. They are frequently associated with Bronze Age activity, though without excavation the date and precise function of any individual example remains uncertain. This one, at around fifteen metres in diameter, falls within a fairly typical size range for such monuments.