The find is a burnt mound, a type of prehistoric site found across Ireland and Britain, typically interpreted as the debris left behind by ancient cooking or heating activities. The method involved cracking rocks in fire and plunging them into water-filled troughs to raise the temperature; the fractured, thermally shocked stones were then discarded in heaps. What makes this particular example quietly arresting is how close it came to being destroyed before it was ever noticed.

The discovery came about through archaeological monitoring that was running alongside an afforestation project, a legal requirement that allows trained observers to watch groundworks for unexpected finds. When a one-metre-wide mounding trench was cut through the sloping ground near the Fiddaunglass, a tributary of the River Deel, the layer appeared just five to fifteen centimetres beneath the topsoil: a spread five to six metres long, oriented roughly east-north-east to west-south-west, packed with fist-sized fractured stones and dark, charcoal-flecked soil. Parallel trenches dug seven and a half to eight metres away to either side showed nothing at all, meaning the deposit is tightly localised. The section of trench holding the mound was back-filled by hand and a fifteen-metre exclusion zone fenced off to keep tree planting away from it. Three further burnt mounds lie nearby along the same stream bank, two of them roughly fifty-five metres to the north-east and a third about ninety metres to the north-north-east, all now sitting within coniferous plantation. That cluster of four sites along a single small watercourse suggests this damp, marginal ground was a place of repeated and deliberate activity, for reasons that the stones alone cannot quite explain.