The working interpretation is that it marks the roof collapse of a souterrain chamber. A souterrain is an underground stone-lined passage or chamber, typically constructed during the early medieval period in Ireland, most often associated with ringforts and thought to have served for storage, refuge, or both. What remains visible here is the negative space left behind, the ground quietly subsiding into a void it can no longer support.

The ringfort itself, recorded separately, provides the context. Ringforts, the enclosed farmsteads of early medieval Ireland, are among the most numerous archaeological monument types in the country, and it was common practice to incorporate a souterrain within or beneath them. The depression at Skahanagh sits in the north-east quadrant of one such enclosure, suggesting that whoever once lived or worked within those earthen banks also made use of the ground beneath them. Whether the chamber was ever fully excavated, or what it contained, is not recorded. What the site preserves is the faint outline of an absence.