Mount Guernsey is an isolated, mainly ice-covered mountain

Mountain

Image:Himalaya_annotated.jpg|thumb|right|The Himalayan mountain range with Mount Everestrect 58 14 160 49 Chomo Lonzorect 200 28 335 52 Makalurect 378 24 566 45 Mount Everestrect 188 581 920 656 Tibetan Plateaurect 250 406 340 427 Rong River...

, 1,250 m, standing 6 nautical miles (11 km) north of the summit of Mount Edgell

Mount Edgell

Mount Edgell is a mountain, 1,675 m, rising eastward of Cape Jeremy, the east side of the north entrance to George VI Sound, on the west coast of Antarctic Peninsula. Discovered by the French Antarctic Expedition under Charcot, 1908-10. Seen from a great distance and thought to be an island, he...

, on the west coast of Antarctic Peninsula

Antarctic Peninsula

The Antarctic Peninsula is the northernmost part of the mainland of Antarctica. It extends from a line between Cape Adams and a point on the mainland south of Eklund Islands....

. The name "Ile Guernesey" was given in 1909 by the French Antarctic Expedition

French Antarctic Expedition

French Antarctic Expedition refers to several French expeditions in Antarctica.-First expedition:Yves-Joseph de Kerguelen-Trémarec was a French explorer....

 under Charcot, after the island

Island

An island or isle is any piece of sub-continental land that is surrounded by water. Very small islands such as emergent land features on atolls can be called islets, cays or keys. An island in a river or lake may be called an eyot , or holm...

 of Guernsey off the coast of France. The position of "Ile Guernesey" on the French Antarctic Expedition maps does not agree with that of the mountain described above, but from the French Antarctic Expedition narrative and sketches by Bongrain, French Antarctic Expedition surveyor, it has been determined that this mountain was the feature seen in 1909 by Charcot from a position near the center of the entrance to Marguerite Bay

Marguerite Bay

Marguerite Bay or Margaret Bay is an extensive bay on the west side of the Antarctic Peninsula, which is bounded on the north by Adelaide Island and on the south by Wordie Ice Shelf, George VI Sound and Alexander Island. The mainland coast on the Antarctic Peninsula is Fallières Coast. Islands...

. The mountain was surveyed in 1936 by the British Graham Land Expedition

British Graham Land Expedition

A British expedition to Graham Land led by John Lachlan Cope took place between 1920 and 1922. The British Graham Land Expedition was a geophysical and exploration expedition to Graham Land in Antarctica between 1934 to 1937. Under the leadership of John Riddoch Rymill, the expedition spent two...

 (BGLE), but no name was assigned. It was further surveyed by the Falkland Islands Dependencies Survey (FIDS) in 1948.