tuff crops out. The Bennet Saddle separates Mount Waesche from Mount Sidley to the northeast. Mount Waesche is largely covered with snow and features several alpine glaciers as well as a blue-ice area within the West Antarctic Ice Sheet; this blue-ice area has an extent of and a number of tephra layers crop out from the ice. Most of these tephra layers come from Mount Waesche, but some originate at Mount Takahe and Mount Berlin and their age ranges from 118,000 years to Holocene. Two particularly conspicuous tephra layers from Mount Waesche are known as the "Great Wall" and "Yellow Wall". The volcano emerges through and is surrounded by the West Antarctic Ice Sheet. The ice sheet reaches an elevation of about above sea level at Mount Waesche and flows southward towards the Ross Ice Shelf. Blue ice is found in some areas. Glacial activity has altered the volcano, generating glacial striae and roches moutonnees on the older volcanic rocks and frost shattering landforms and solifluction ridges. Glacial drift lies on the ice-free southwestern flank. In turn, glacial moraines have been overrun by lava flows. Two sets of moraines formed by volcanic debris – one containing ice, the other without – lie on the southern and southwestern flank, reaching heights of and lengths of about . Surface exposure dating has indicated that they belong to an ice highstand that occurred about 10,000 years ago and that the volcanic rocks were probably extracted from underneath the ice. However, large parts of the volcano are exposed on its southwestern flank and apart from glacial erosion aeolian erosion has taken place on the volcano. Geology Mount Waesche is part of the Executive Committee Range, which from north to south includes Mount Hampton, Mount Cumming with the parasitic vent Annexstad Peak, Mount Hartigan, Mount Sidley with Doumani Peak and Chang Peak-Mount Waesche. These mountains are all volcanic and feature ice-filled calderas, and many are paired volcanoes. Volcanic activity appears to be moving southward at a rate of . Seismic activity recorded in 2010 and 2011 south of Mount Waesche may indicate ongoing magmatic activity south of the youngest volcano. Chang Peak and Mount Waesche appear to be located outside of the Executive Committee Range volcanic lineament. The volcano erupted comendite, hawaiite and mugearite, with the former found at Chang Peak and the latter two at Mount Waesche proper; the parasitic cones have erupted a