Geology of the Kingston Area

Abstract

In the Kingston-Blackmans Bay area, flatly dipping Permian marine sediments ranging in age from the Quamby Group (Upper Sakmarian) to the Ferntree Mudstone (Kazanian) are overlain, with slight angular discordance, by terrestrial Triassic sandstone. The sedimentary rocks have been intruded by Jurassic dolerite in the form of sills and transgressive sheets. Tertiary faulting, producing an approximately north-south parallelism of large-scale structures, preceded volcanic activity in which basalt flows covered much of the area.