Airborne Laser Swath Mapping of the Denton Hills, Transantarctic Mountains, Antarctica: Mapping relations between glacial and tectonic landforms

New high-resolution digital elevation data were obtained by airborne laser scanning (ALS) using NASA's ATM system for the Denton Hills, along the coastal foothills of the Royal Society Range, Transantarctic Mountains. Digital elevation models, displayed as shaded-relief images and slope maps, portray geomorphic landscape features in unprecedented detail across the region. Lineaments etched into bedrock occur in both northwest and northeast orientations, and most likely represent fault arrays and associated fracture planes. Though the ages of these brittle structures are poorly constrained, at least some are neotectonic faults as shown by a northeast- trending lineament cutting a hanging valley terminal moraine. Mappable glacial features include the western limit of the Ross Sea drift, recording the limit of grounded ice at the Last Glacial Maximum; ridges and mounds interpreted as lake-ice conveyor deposits from proglacial lakes; and uplifted lake shorelines providing markers for documentation of postglacial rebound magnitude and rates. In addition to the ability to map the extent of glacial features spatially, the high-resolution topographic data makes it possible to quantify feature height, length and breadth, and to systematically measure such aspects as paleoshoreline elevations across the region.