On Sunday, 13th November 2016, twelve members of the Association visited Rocky Bay and Roberts Cove led by Prof, Ken and Bettie Higgs.
The rocks in Rocky Bay are part of the Old Head Formation of Old Red Sandstone and belong to the Upper Devonian period and at this spot we have the Rocky Bay member of that formation. The rocks at the western end of the bay are older and as we move east the rocks are younger and higher up in the succession. Roberts Cove rocks to the east are younger still.
Overlying the sandstone and mudstone are varying depths of glacial till of boulder clay carried here by the melting glaciers of the Ice Age. Some silt, clay and gravel was also deposited by melt waters from the ice. The coastline here is subject to erosion, particularly along the eastern part of the beach and care should be taken when close to the cliff edge.