This is a fulacht fia, one of the most common prehistoric monument types in Ireland, and yet individually they remain among the least celebrated. The typical fulacht fia consists of a horseshoe-shaped or kidney-shaped mound of shattered stone surrounding a trough, usually timber-lined and cut into the ground. The method was straightforward: stones were heated in a fire and dropped into a water-filled trough until the water boiled, then used to cook meat or, according to some researchers, to serve purposes ranging from textile processing to communal bathing. The shattered, heat-spent stones were raked aside after each use, and over centuries of repeated activity these discarded stones accumulated into the characteristic mound that survives today.

Fulachtaí fia, to use the Irish plural, date most commonly to the Bronze Age, roughly 1500 to 500 BC, though some sites have produced earlier or later dates. They tend to cluster near water sources, since a reliable supply was essential to the whole process, and Mayo's boggy, well-watered landscape is well suited to their survival. Peat growth has preserved many such sites across the west of Ireland in conditions that would have destroyed them elsewhere, keeping the charcoal, the wooden troughs, and even the animal bone that might otherwise have vanished. The Davros example is one of many recorded across the county, part of a broader prehistoric pattern that speaks to the density of Bronze Age activity in this part of Connacht.