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Bedrock-Sculpturing By Tsunami, South Coast New South Wales, Australia, Edward A. Bryant, R. W. Young

Faculty of Science - Papers (Archive)

Bedrock-sculpturing resulting in s-forms is associated with catastrophic flooding in near- and subglacial environments produced by flow velocities approximating 10 m s-1. These velocities can also be produced by extreme tsunami generated by submarine landslides or comet impacts with oceans. Repetitive tsunami events during the late Holocene have overwashed headlands along the New South Wales south coast and produced two suites of bedrock-sculptured terrain. At the smaller scale, s-forms similar to muschelbrüche, v-shaped grooves and sichelwannen have developed on upslopes while broad potholes, flutes and transverse troughs have formed on headland crests. Cavitation features consisting of sinuous grooves, impact marks, …