Journal article

The evolution of sea cliffs over multiple eustatic cycles in high energy, temperate environments

Rhiannon Bezore, David M Kennedy, Daniel Ierodiaconou

Continental Shelf Research | PERGAMON-ELSEVIER SCIENCE LTD | Published : 2019

Abstract

Sea cliffs are steep, erosional features carved out of rocks by marine and subaerial erosive processes. They are defined as a surface at the coast with a slope angle of greater than 20°. The broad morphology of these cliffs is determined by the relative magnitude of the erosive processes and the resistance of the lithology in which they are formed. In this study, an integrated aerial LiDAR and multibeam dataset from +20 to −80 m water depth is used to precisely quantify sea cliff morphology. Over 260 km of cliffed coastline was identified and analyzed along the high-energy temperate coast of Victoria, Australia, with cliffs occurring down to 60 m depth. Cliffs at present sea level were found..

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University of Melbourne Researchers

Grants

Funding Acknowledgements

We thank Parks Victoria for funding the capture of the multibeam sonar data used in this study. We thank members of the crew Sean Blake and Dr Alex Rattray of Deakin University's research vessel Yolla for assistance in the collection of the multibeam sonar data. We thank the Department of Environment and Primary Industries Department of Environment and Primary Industries coordinated imagery program for access to the georegistered aerial photography and the Future Coasts Program for access to the LiDAR data. We thank Ian Atkinson from Geoscience Australia and Nicole Bergersen from Acoustic Imaging Pty Ltd for technical support provided during MBES data capture and analysis. Rhiannon Bezore was supported by the Melbourne International Research Scholarship from The University of Melbourne.