Notes on a "Fayalite Basalt" from One Tree Point

The rock on which these notes have been written occurs as a basaltic flow in a small promontory, on the far side from Hobart, of Sandy Bay. The geological age of basaltic flows and tuffs is given by Mr. R. M. Johnston (Systematic Account of the Geology of Tasmania, p. 249 et seq.) as being younger than the tertiary leaf-beds, and from the occurrence of this rock and its associates, sections of which can clearly be seen on the Brown's River Road, there seems to be no reason for doubting that the age ascribed is approximately correct