A midden, which is essentially a prehistoric or early historic refuse heap, typically composed of discarded shellfish remains, animal bone, and other domestic waste, was observed here eroding out of the dune system when archaeologists first visited in August 1984. It sat roughly a metre below the ground surface of the time, suggesting the deposit had accumulated well before the present landscape took shape above it.

What the archaeologists found was a fairly typical coastal midden assemblage: a mixed spread of oyster, mussel, and periwinkle shells, with small quantities of burnt stone mixed in. Burnt stone of this kind is often associated with ancient cooking practices, sometimes linked to the use of fulachta fiadh, outdoor hearths where stones were heated and dropped into water-filled troughs to boil food, though no such structure was recorded here specifically. The deposit gave a clear indication that people had gathered and processed shellfish on this shore over an extended period, making use of the island's proximity to productive intertidal feeding grounds. When a follow-up visit was made in April 2014, the midden had disappeared from view entirely. Erosion had reshaped that corner of the island, and a significant accumulation of blown sand had built up against the dune system, almost certainly burying the deposit once more beneath the shifting ground.