The one recorded at Shannakea Beg, in County Clare, is typical of a class of site that tends to be overlooked precisely because it looks so modest from the outside, usually a low, kidney-shaped or crescent mound of heat-shattered stone and dark, charcoal-flecked earth, easy to mistake for a natural rise in a field.

Burnt mounds, known in Irish archaeology by the term fulacht fiadh, are generally dated to the Bronze Age, roughly 1500 to 500 BC, though some examples fall outside that range. The defining feature is the accumulation of fire-cracked stone, the residue of repeated heating. The broadly accepted interpretation is that stones were heated in a fire and then dropped into a water-filled trough to bring it to a boil, making these sites evidence of cooking, and possibly bathing or textile processing, carried out over many generations. The mound itself is simply the discard heap, the used stones piled up each time they became too fragmented to hold heat. Most burnt mounds are found near a reliable water source, a stream or spring, which in the Irish landscape often means low-lying, boggy ground. Clare, with its varied terrain running from the limestone plateau of the Burren down to the Shannon estuary, contains numerous recorded examples, each one a quiet accumulation of domestic labour from a world that left almost no other written or visible trace.