First recorded by Harte in the 1860s, who described it as the largest of several shell beds in the area, this archaeological feature stretched approximately 80 to 100 metres along a ridge between a field's western edge and a late medieval church site. When Harte investigated the location at Blanket Nook, he observed that much of the shell material had already been dug over and burnt for lime, whilst the encroaching sea had exposed more of the deposit than other nearby middens.

The site gained renewed attention during the Lough Swilly Archaeological Project in 2001, when researchers Kimball, Woodman and Milner conducted fieldwalking surveys that yielded a small but significant collection of Mesolithic and Neolithic artefacts. Their inspection revealed an extensive scatter of oyster shells throughout the topsoil, though unfortunately, no intact portions of the original midden remain in situ. Harte's earlier work had also produced flint flakes and split bones from the site, typical finds that suggest this was once a thriving spot where ancient communities processed marine resources and discarded their food waste.

Today, visitors to the area would find little obvious evidence of this prehistoric activity, save for deposits of crushed shell fragments downslope from the ridge; these appear to be naturally reworked marine deposits rather than original archaeological material. Despite the site's degraded condition, it remains an important piece of the puzzle in understanding how Ireland's earliest inhabitants utilised coastal resources, particularly during the Mesolithic and Neolithic periods when shellfish gathering formed a crucial part of subsistence strategies along the Atlantic coastline.