Large asymmetric polar scarps on Planum Australe, Mars: Characterization and evolution

► We make a geomorphologic description of some icy scarps of Planum Australe, Mars. ► We show they are very similar to listric normal faults on Earth. ► A formation scenario implying a mechanical failure and a basal sliding is proposed. ► We emphasize the implications to the ice rheology and basal conditions of the cap.