The form of the intrusive complex at mount dromedary, New South Wales

Abstract

In the past the Mount Dromedary igneous complex has been regarded as a differentiated laccolith, with the more felsic banatite at the summit of the mountain, monzonite on the lower slopes and pyroxenite at sea‐level. Evidence is put forward to show that this is not the case and that the form is that of a stock or ring‐dyke with very steep contacts. The monzonite has been emplaced by forceful injection and the banatite by permissive emplacement along a vertical, cylindrical fracture in the monzonite. The pyroxenite may form a separate dyke or stock.