No earthwork rises above the surface, no stones mark the perimeter; what survives is a cropmark, the faint but legible trace of something buried, made visible when differential soil moisture causes crops or grass above a filled ditch to grow at a slightly different rate or colour from the surrounding ground. Aerial photography, and in this case satellite imagery, can catch these distinctions on the right day, in the right season, when conditions align just so.

The feature is identified as a ring-ditch, a circular or near-circular ditch that in Irish archaeology is most commonly associated with prehistoric funerary or ritual activity. Such ditches frequently enclosed a central burial, sometimes beneath a mound that has since been levelled by centuries of ploughing, sometimes never raised at all. The Bawnoge example, with its approximate five-metre diameter, sits at the smaller end of the scale. It was identified from a Google Earth image captured on 14 July 2018, a midsummer date when crop stress is often at its most revealing.