These features are known as burnt mounds, and they appear across Ireland in considerable numbers, most often dating to the Bronze Age. The working theory is that they represent cooking sites, where stones were heated in a fire and then dropped into water-filled troughs to bring the water to the boil, though some scholars suggest the troughs may also have served as bathing or industrial facilities. The stones crack and blacken with repeated heating, and over time the discarded fragments pile up into the distinctive spreads that survive in the archaeological record.

This particular mound, designated Spread B during excavation, was uncovered by archaeologist Yvonne Whitty as part of work along the N11 road corridor in Kilmurry. What made it especially interesting was the presence of not one but four separate deposits of burnt material, which Whitty interpreted as possibly indicating four distinct phases of activity at the same spot. Beneath all of that accumulated debris, the excavation revealed a trough and a pit; the pit may have served as an auxiliary trough, suggesting that whoever returned to this location over time was engaged in repeated, organised activity rather than a single episode of use. The trough itself would have been the functional heart of the operation, holding water that the heated stones were used to warm.