A peat deposit occasionally exposed behind a sandy offshore bar. The deposit is reported to contain tree stumps and fallen trunks.

Sources include:
Bell, M, 2007, Prehistoric Coastal Communities: The Mesolithic in Western Britain, CBA Research Report 149, pg2
Gwynedd Archaeolgical Trust HER ref: 16599
Smith, G, Davidson, A and Kennedy, J, 2002, North Wales Intertidal Peat Survey, report 450, Gwynedd Archaeological Trust

Maritime Officer, RCAHMW, February 2013.