A cairn is essentially a deliberate accumulation of stones, often prehistoric in origin and associated with burial or landscape marking. What sets this one apart is that it was not simply raised on open ground; it was built on top of a pre-existing mound wall, layering one phase of human activity directly onto another.

Recorded by Keegan in 2016, the cairn measures approximately four metres east to west and three metres north to south, placing it firmly on the smaller end of such monuments. The mound wall on which it sits is itself part of a broader story. That same wall abuts an enclosure lying roughly sixteen metres to the east, suggesting the landscape here was being organised and reorganised over an extended period. The whole area sits within a field system that spreads across the Termon plateau, meaning the cairn is not an isolated curiosity but one element in a dense, overlapping pattern of past land use, where boundaries, enclosures, and monuments accumulated across generations rather than being planned as a whole.