The full extent of the feature remains unknown, because it disappears further into the cliff, but what is visible already raises questions about how, and why, someone was moving across this part of the island in the first place.

The feature came to light in 2001 during an assessment carried out ahead of conservation works on the island. Archaeologists Dunne and Ryan recorded the burnt layer at a depth of around twelve centimetres, composed of angular stones averaging roughly six by four centimetres, overlying a possible linear trackway nearly four metres wide and oriented north-west to south-east. Beneath the stone metalling, the ground is peat, and the working interpretation is that the stones were laid deliberately to stabilise what would otherwise have been waterlogged, yielding terrain. What makes the material itself notable is its likely origin: the heat-shattered stone may have been quarried not from bedrock but from a nearby fulacht fia, a type of prehistoric cooking site, typically identified by its characteristic mound of fire-cracked stone left over from repeated cycles of heating and water-boiling. If that interpretation is correct, material discarded from one purpose, cooking or perhaps hide-processing, was later repurposed entirely, pressed into service as hardcore under a path. The reuse of fulacht fia debris as practical fill or metalling is known elsewhere in Ireland, but finding it exposed in a cliff section on a tidal island in the Shannon estuary gives the detail a particular texture.