I have been calling many of the rock abstracts that I have made whilst walking along the coast between Petrel Cove and Kings Head granite, when they should be termed Kanmantoo. These Kanmantoo group rocks are typically derived from the Cambrian Period sedimentation in shallow ocean.
According to the Coastal Landscape of South Australian text these Cambrian metasedimentary rocks are aligned with the Encounter Fault, occur northeast of Newland Head, diminishing in height towards King's Head and the Bluff (Rosetta Head). The small pocket beaches, largely derived from erosion of Permian glacial deposits, occupy bays eroded into less resistant Cambrian rocks.