This is a fulacht fia, a type of prehistoric cooking site found in extraordinary numbers across Ireland, and one of the most commonly recorded monument types in the country. The typical form involves a horseshoe-shaped mound of burnt and shattered stone, the debris from repeatedly heating rocks and dropping them into a water-filled trough to bring it to a boil. They cluster near streams and wet ground, and their precise purpose, whether cooking, bathing, brewing, or some combination, has kept archaeologists debating for decades.

The Killinane example sits in pasture, and what survives is described as a spread of burnt material, the characteristic scorched and fragmented stone that accumulates over repeated use of such a site. A drain cut into the eastern side of the spread has disturbed part of the deposit, the kind of agricultural intervention that has affected countless similar sites across the Irish countryside over centuries of drainage and land improvement. Beyond that basic outline, the site has left little on the surface to distinguish it from the grass around it.