Iceberg Ploughmarks Indicate Past Rapid Iceberg Calving and Retreat of Pine Island-Thwaites Ice Stream due to Marine Ice-Cliff Instability Processes

Matthew Wise, Scott Polar Research Institute, University of Cambridge, Cambridge, CB2, United Kingdom, Julian A. Dowdeswell, Scott Polar Research Institute, University of Cambridge, Cambridge, United Kingdom, Robert D Larter, NERC British Antarctic Survey, Cambridge, United Kingdom and Martin Jakobsson, Stockholm University, Department of Geological Sciences, Stockholm, Sweden