This is a kitchen midden, a domestic refuse heap in the archaeological sense, and its scale is remarkable. Stretching approximately 137 metres in length and around 46 metres wide, it is not a modest scatter of shells but a substantial deposit that speaks to sustained, repeated occupation of this corner of Inis Oírr.

The site was recorded by Mason in 1938, who described the characteristic mixture of limpet shells, split bones, and charcoal that typically accumulates wherever communities have processed seafood and cooked meat over open fires across many generations. Limpets were a dietary staple along the western Atlantic coast for millennia, gathered from rocks at low tide, and their shells preserve well in sandy, alkaline ground. The splitting of bones suggests marrow extraction, a practice common across prehistoric and early historic periods. Robinson noted in 1980 that surface traces remained clearly visible, particularly on the north-facing slope just outside the graveyard gate of St Caomháin's church.

Visitors to Inis Oírr who make their way to St Caomháin's church, which is itself half-buried in sand and the focus of an annual pattern day in June, should look to the slope immediately outside the graveyard entrance. The midden material is visible at the surface, the pale shell fragments catching the light against the sand. It asks very little of the visitor beyond attention, and what it offers in return is a quiet sense of the island's long human presence, laid out in the ordinary leavings of ordinary meals.