Geology of hill end trough Molong high: The merrions tuff ? its Genesis

Abstract

The Early Devonian Merrions Tuff is a volcanogenic pulse up to 990 m thick, interrupting the more normal deposition of greywacke-slate sequences of the Hill End Trough. It is a distinctive, competent structural and stratigraphic datum for the Trough sequence (Fig. 1). Unfolding suggests that it may have had 1½ times to twice its present areal extent of approximately 1,850 km2 with the major shortening being in an east-west direction.