Antarctica of centuries. Several Antarctic ice streams, which account for about 10% of the ice sheet, flow to one of the many Antarctic ice shelves: see ice-sheet dynamics. East Antarctica lies on the Indian Ocean side of the Transantarctic Mountains and comprises Coats Land, Queen Maud Land, Enderby Land, Mac. Robertson Land, Wilkes Land, and Victoria Land. All but a small portion of this region lies within the Eastern Hemisphere. East Antarctica is largely covered by the East Antarctic Ice Sheet. Vinson Massif, the highest peak in Antarctica at , is located in the Ellsworth Mountains. Antarctica contains many other mountains,
Mount William (Antarctica) Mount William (Antarctica) Mount William is a prominent snowy mountain in Antarctica, standing tall, and located north-northeast of Cape Lancaster which is the south extremity of Anvers Island, in the Palmer Archipelago. This is the tallest mountain visible from Biscoe Bay, near the south end of the island's Osterrieth Range which also includes Mount Français (the tallest mountain on the island). This mountain was discovered on February 21, 1832, by John Biscoe who incorrectly believed it to be part of the mainland of Antarctic Peninsula, instead of on an island. He named it for William IV, then King of the