About 18 central volcanoes were active in Marie Byrd Land from the Miocene to the Holocene. Among the volcanic areas in Marie Byrd Land are the Flood Range with Mount Berlin, the Ames Range, the Executive Committee Range with Mount Sidley and Mount Waesche, the Crary Mountains, Toney Mountain, Mount Takahe and Mount Murphy. These volcanoes mainly occur in groups or chains, but there also are isolated edifices. Mount Takahe could be the largest of these volcanoes, comparable to Mount Kilimanjaro in Africa.