A ring-ditch, roughly fifteen metres in diameter, betrays itself only as a cropmark, the faint ghost of a fosse, a term for a defensive or boundary ditch, showing up in satellite imagery where the soil above it retains slightly different moisture and causes the crop overhead to grow and ripen at a different rate to its surroundings. It is the kind of archaeology that exists in a peculiar liminal state, recorded but not excavated, present but not visible, known only because someone thought to look carefully at an aerial photograph.

The site was identified and reported by Jean-Charles Caillère, whose observation drew attention to a feature that might otherwise have gone unremarked in the agricultural landscape of this part of Kilkenny. Ring-ditches of this type are generally associated with prehistoric funerary or ritual activity, often the eroded remnants of burial mounds whose earthen mass has long since been ploughed flat, leaving only the encircling ditch as a trace in the subsoil. What makes Foulkscourt quietly interesting is not just the ring-ditch itself but its relationship to a second, larger enclosure located approximately forty metres to the south-south-east. That companion feature, also visible as a cropmark, hints at a concentration of past activity in this small area of ground, two circles in a field, separated by a short distance, each holding its own uncertain purpose.