What lies beneath is burnt material, rising to about a metre in height, and where the stream has cut into the bank it exposes the dark, fire-cracked debris within. This is a fulacht fia, a type of prehistoric cooking site found in great numbers across Ireland, typically dating to the Bronze Age. The name, loosely translated, refers to a cooking place associated with hunters or warriors, and the standard interpretation is that stones were heated in a fire and then dropped into a water-filled trough to bring it to a boil, with the shattered, heat-spent stones gradually accumulating into the distinctive horseshoe-shaped mound that survives today.

Fulachtaí fia tend to cluster near water sources, and this example follows that pattern closely, positioned beside the stream that has, over time, done some of the archaeological work by eroding a section through the mound and revealing its interior. The burnt stone and charcoal-rich fill visible in that exposed section are the accumulated waste of repeated use, each cooking episode adding another layer to what eventually became a permanent feature in the landscape. Mid-Cork has a considerable density of such sites, reflecting both genuine prehistoric activity and the preservation conditions that scrubby, low-lying ground beside watercourses tends to provide.