What came to light was the skeleton of a keyhole kiln, a type of corn-drying or grain-processing structure recognised by its distinctive rounded chamber and projecting flue channel, measuring roughly 3.6 metres by 2 metres. It is not a dramatic ruin. What survived was scant: shadowy impressions of flues pressed into the base, and three layers of fill dense with charcoal, fire-cracked stones, and oxidised clay, the residue of sustained, repeated burning.

The site at Aghamore came to attention during preparatory testing in 2005 for a new stretch of the N4 road between Dromod and Roosky, carried out under licence by O'Connor, Muniz Pérez, and Conran. That preliminary work flagged the area as archaeologically significant, and a fuller excavation followed under the designation Aghamore 2. What the excavation revealed was not a single feature but a cluster: five spreads of burnt mound material, several smaller spreads, and two kilns in close proximity. Burnt mounds, which are accumulations of fire-cracked stone and charcoal-blackened earth left over from repeated heating of water or other processes, are among the most common prehistoric monument types in Ireland, though their precise function is still debated. The keyhole kiln recorded here, with its companion structure just to the south-west, suggests this bogside location was used for sustained processing activity over some period of time. The excavation findings were reported by McGowan and O'Connor in 2009.