A semi-circular cropmark, roughly thirty metres in diameter, emerges in aerial imagery where an ancient enclosure meets a stream or ravine, its circuit running right to the edge before the land drops away. The shape suggests a defended or enclosed space that once used the natural break of the terrain as part of its boundary, a common enough strategy in early Irish settlement, where a cliff face, riverbank, or steep-sided gully could substitute for a constructed rampart along one side.

Cropmarks appear when buried features such as ditches, banks, or walls affect how vegetation grows above them, producing differences in colour or height that become legible from altitude, particularly in dry summers when soil moisture varies sharply. The semi-circular outline visible here was identified in Google Earth imagery captured on 10 July 2018, and the site was subsequently recorded by Caimin O'Brien working from details supplied by Jean-Charles Caillère, with the record uploaded in May 2019. Without excavation, it is impossible to say with confidence what period the enclosure belongs to or what purpose it served, though semi-circular enclosures running to a natural boundary are broadly consistent with early medieval ringfort traditions, where the completed circuit of a rath or cashel was sometimes supplemented by a watercourse or scarp.