What makes this particular feature quietly compelling is the way later farming practice has folded itself around and through it: a post-1700 field boundary cuts across the eastern side of the earthwork, literally transecting it, while a holy well has been absorbed into the field bank to the south. The result is a layered landscape where early medieval religious geography and post-medieval land management have become physically entangled.

Ecclesiastical enclosures of this kind, roughly circular or oval boundaries that once defined the sacred precinct of an early Irish monastery or church site, are found across Ireland, and the one on Carrig Island is recorded as a distinct monument in its own right. The earthwork occupies its north-western quadrant, suggesting it may pre-date or be contemporary with the enclosure itself, though its precise function remains unclear from what survives on the surface. The holy well to the south, now integrated into a field bank, is a common feature in such settings; wells of this type were frequently associated with local saints and patron days, and their incorporation into later field systems often reflects the gradual secularisation of the surrounding land rather than any deliberate erasure of the sacred. The post-1700 field boundary that cuts through the earthwork is a reminder of how dramatically the organisation of Irish agricultural land shifted in the centuries following the upheavals of the seventeenth century.