The outcrops are variously strewn with lichens, barnacles and limpets and fucoids, according to locality and aspect. The bedrock is exposed as rocky outcrops on the beach at Gortenfern. The geology of the region is mainly metamorphosed Pre-Cambrian sedimentary rock (Morar Group- semipelite and pelite), surrounded by Morar group psammite. There are some lovely views of the Small Isles. The beach is surrounded by Calluna-vulgaris, Empetrum nigrum- Carex arenaria heath. Gortenfern beach is equally stunning and a great place for a picnic, beach-combing and exploring the rocky coastline. The Bay is particular lovely in Spring and Summer when the salt marsh is awash with the pink hues of flowering thrift ( Armeria maritima).
Kentra Bay contains a large expanse of mudflat at low tide and small fragments of salt marsh, sand dune and machair. An enjoyable walk to the beautiful Singing Sands at Gortenfern in the Ardnamurchan, skirting around the southern edge of Kentra Bay and then through coniferous plantation.
