The one at Teeronea in County Clare belongs to a category of monument known in Irish as fulacht fiadh, the remains of which typically appear as low, kidney-shaped or horseshoe mounds of fire-cracked stone and dark, charred soil. They are found near water almost without exception, and the leading interpretation is that they were used for cooking or heating water, possibly also for bathing or textile processing, by dropping stones heated in a fire directly into a water-filled trough. The process is simple and remarkably effective, and experimental archaeology has repeatedly confirmed it works.

Most burnt mounds date to the Bronze Age, roughly 1800 to 800 BC, though some examples have been shown through radiocarbon dating to fall outside that window in either direction. They tend to accumulate over repeated episodes of use, the discarded cracked stone building up gradually around the trough until the mound becomes visible in the ground. What distinguishes them from other prehistoric features is precisely this ordinariness, the absence of ceremony or monumentality. They are the residue of repeated, practical activity, which may be why they were overlooked for so long. The Teeronea example sits in a part of Clare where the landscape retains a good deal of early material, and its presence there is consistent with the wider pattern of Bronze Age activity across the county.