It is the kind of feature that a plough turns up without ceremony, yet it represents one of the most persistently mysterious monument types in the Irish archaeological record. This is a fulacht fia, a term used to describe the remains of a burnt mound, typically a horseshoe-shaped heap of fire-cracked stone and charcoal that accumulated around a water trough, probably used for cooking or possibly for other purposes such as bathing or textile processing. They are found in their thousands across Ireland, usually Bronze Age in date, and almost always positioned close to a water source.

The Corrin example sits to the north-west of what may be a ringfort, an enclosed farmstead of the early medieval period, though the proximity may be coincidental given how densely these monuments are distributed across the Cork landscape. More striking is that two further fulachta fiadh lie nearby, suggesting repeated use of this general area over time, perhaps because the ground conditions and water supply made it consistently attractive. A stream appears on an Ordnance Survey map from 1935 running to the north of the site, and the proximity of running water is almost a defining characteristic of this monument type. The standard interpretation is that stones were heated in a fire and then dropped into a water-filled trough to bring the water to a boil, with the cracked and spent stones discarded to the side, building up the mound over successive episodes of use.