fault scarp Active tectonics 4 Antarctica 4 Arctic and Antarctic 4 Argentina 4 Arroyo Alicurá 4 Cura 4 Deception Island 4 Fault escarpment 4 Headward erosion 4 Limay Chico 4 Limay Valley 4 South America 4 South Shetland Islands 4 Straight coast 4 Stream piracy 4 Tectonic geomorphology 4 Uplifted terraces 4 World 4 coastal landform 4 fluvial geomorphology 4 fluvial process 4 headwater 4 river evolution 4 sediment transport 4 slope stability 4 stream channel 4 streamflow 4 submarine feature 4 terrace 4