It sits on what appears to be an earlier shoreline of the lake, meaning the water level has risen since the feature was in use, quietly submerging whatever activity once took place there. Whether it is a fulacht fia or simply a hut site remains an open question, and that ambiguity is part of what makes it worth attention.

A fulacht fia is a type of prehistoric cooking or boiling site, typically identified by a horseshoe-shaped mound of burnt and fire-cracked stone, the debris left behind from repeatedly heating rocks and dropping them into a water-filled trough. The mound here, measuring 13 metres east to west and 9 metres north to south, is circular rather than the classic horseshoe shape, and it carries a rectangular feature set off-centre towards its south-east. It was noted during a survey of a crannog approximately 120 metres to the south-east, a crannog being an artificial or partly artificial island used as a dwelling, typically in the early medieval period. The two features may have nothing to do with one another chronologically, but their proximity in the lough prompted surveyors to record this mound as well. It is identified as the more westerly of two possible fulachta fia in this part of the lake, the second lying close by to the east. The information was provided by K. McDonald, and the uncertainty in the identification has been preserved rather than resolved.