Geomorphic constraints on the Late Neogene tectonics of the Otway Range, Victoria

Abstract

A Pliocene strandline system in the Hanson Plain Sands, between the volcanic plains of the Western District and the northern flanks of the Otway Range in southwest Victoria, provides an excellent datum against which to measure Late Neogene fault-related uplift. Individual strandlines that can be traced from elevations of ∼ 120 m near Cobden to ∼245 m on the Ferguson Hill structure are displaced across northeast-trending faults and monoclines associated with the Simpson and Ferguson Hill structures. A break in slope in the Otway Range front at elevations of 230-280 m, beneath which drainage incision parallels the trends of the strandlines, probably correlates with the Pliocene coastline on th..