A reconnaissance of the Corinna-Pieman Heads area-Geology

Abstract

Slates, phyllites, quartzites, conglomerates and dolomite of Pre-Cambrian age occur in a faulted anticline. They have been intruded by pre-metamorphic basic rocks which occur as a dyke swarm, by Cambrian ultrabasic rocks around Heazlewood and by Devonian granites at the Pieman Heads. The granite lies along the axis of the anticline. The Pre-Cambrian rocks have been divided into four sets of beds which have been named. They have suffered low-grade regional metamorphism with superimposed thermal metamorphism near the granite. A major fault which occurs along the Donaldson River is a member of a system of faults with north-easterly trend. Silicified conglomerates and basalt of Tertiary age overlie the older rocl{s unconformably along the Corinna Road.