This is a ring barrow, a type of funerary earthwork in which a circular burial area is enclosed by a combination of a scarped edge, a shallow fosse or ditch, and an outer earthen bank. The example at Moanmore is modest in scale, just three metres in diameter internally, with a fosse barely five centimetres deep and a bank that rises only ten centimetres above the surrounding ground. That such a slight construction has survived at all, through centuries of agricultural use in persistently damp ground, is quietly remarkable.

The monument was identified during a field survey carried out by Mark Keegan in January 2005, and what he found was not one isolated feature but a cluster of related monuments in close proximity. A second ring barrow abuts this one directly on its east-northeast side, and the outer bank of both structures has merged on the west-southwest, so that they effectively share a boundary, the earthworks of each folding into the other. A third ring barrow lies roughly seventy metres to the northeast. The grouping suggests that Moanmore was a place of deliberate and repeated funerary significance at some point in prehistory, with the dead gathered together in this unassuming stretch of pasture rather than dispersed across a wider landscape. The fact that the scarped edge, fosse, and bank are barely visible along the northern to southeastern arc, while the interior remains level and clear of overgrowth, gives some sense of how precarious the survival of low earthworks like these can be in working farmland.