Stratigraphic terminology of low-grade metamorphosed rocks at Bathurst Harbour, S.W. Tasmania

Abstract

A sequence of low-grade metamorphosed rocks surrounding Bathurst Narrows and Joe Page Bay in southwestern Tasmania crops out between areas of higher-grade metamorphic rocks. The higher-grade rocks have undergone at least two deformation events which did not affect the lower-grade rocks and are inferred to be the older of the two sequences. The lower-grade rocks are divided into five formations with conformable boundaries between them. These formations together form the Clytie Cove Group. A correlate of the Clytie Cove Group occurs ten kilometres to the east of the type section of the Group, which is around Bathurst Narrows and Joe Page Bay. Previously proposed correlations of the Clytie Cove Group with rocks in the Davey River area and on the West Coast Range are invalid, as they were based on an incorrect and incomplete stratigraphic section at Bathurst Narrows.