Geology
The Western Australian South Coast is formed along the edge of the southern margin of the Yilgarn craton and is fringed with prominent headlands composed of granite and gneisses formed by Proterozoic tectonic activity. Arcuate Bays that contain beaches backed by holocene dunes are found between the headlands.
King George Sound includes many islands and some islets, these are all composed of granite with accumulations of soil on most.
Islands of note include Breaksea Island, Michaelmas Island, Seal Island, Mistaken Island, and Green Island
Read more about this topic: King George Sound