The typical form is a horseshoe-shaped mound of fire-cracked stone, built up over generations of use beside a trough or pit that would have been filled with water and heated by dropping in stones from a fire. They are among the most common archaeological monuments on the island, yet individually they tend to disappear quietly, and this one is no exception.

The site at Ballycrenane was levelled in the late 1960s during land reclamation work. What survived the clearance was a single flint flake, recovered from a spread of burnt material, the scorched debris that is the hallmark of fulacht fia activity. The piece, a butt-trimmed leaf-shaped flake measuring roughly eight centimetres in length, is now held in the National Museum of Ireland under registration number 1972:354. The presence of a worked flint in association with burnt stone is not unusual in itself, but it ties the site to a tradition of tool use that stretches back well into prehistory, and the careful trimming of the piece suggests it was made rather than simply found. The find was noted by Cherry in 1990, some years after the monument itself had already been removed from the landscape.