A circular ring-ditch, roughly six metres across, appeared as a cropmark in the imagery, its outline made legible only because the buried ditch below affects the soil's moisture and nutrients, causing the crops above it to grow slightly differently from those around it. It is the kind of feature that is invisible at ground level and yet perfectly legible from above, a ghost in the grain.

The feature was identified and reported by Simon Dowling, and it does not stand alone. The Clomantagh site appears to be part of a barrow complex, a grouping that includes at least four other ring-ditches and a further enclosure visible in the same area. Barrows are prehistoric burial monuments, and ring-ditches are typically what survives of them once the central mound has been levelled by centuries of agriculture. What remains underground is the circular ditch that once surrounded the mound, along with whatever deposits, cremated remains, or grave goods were placed within it. The clustering of multiple such features in one field suggests this was once a significant funerary landscape, the kind of place where a community returned, generation after generation, to bury its dead.