This child group collects Glaciers of Antarctica members located in West Antarctica, the smaller of the continent's two main landmasses, spanning Marie Byrd Land, Ellsworth Land, the Ellsworth Mountains and Heritage Range, Thurston Island and the Amundsen and Bellingshausen Sea coasts. West Antarctica's ice sheet rests mostly below sea level and is considered more vulnerable to warming than East Antarctica's, so its named glaciers, including major outlets such as those feeding Pine Island Bay, are of particular scientific interest even though this sector contributes fewer named entries than the Ross Sea or Peninsula sectors.