Area: 6.7 hectares.
Description and Reasons for Notification:
The rock platform along the Kingsand beach section is the only exposure in south-west England of an extrusive (hot magma out-flow) rhyolite (silica rich volcanic rock) flow of Permian age. Its significance lies in the strong possibility that it is representative of suprabatholithic (on top of a batholith - sub-surface magma intrusion) volcanic activity after the emplacement of the Cornubian granites. In this connection it is the only in situ example of extensive early Permian volcanicity that is now largely seen as pebbles in the New Red Sandstone denudation products.