During the excvation of the Swansea Docks, a submerged forest and peat deposits werre recorded in section.

Sources include:
Bell, M, 2007, Prehistoric Coastal Communities: The Mesolithic in Western Britain, CBA Research Report 149, pg2
Moggeridge, M, 1856, On the section exposed in the excavation of the Swansea Docks, Quartentary Journal of the Geological Society 12, 169-71

Maritime Officer, RCAHMW, February 2013.