Mount Sidley
| Mount Sidley | |
|---|---|
Aerial view of the Mount Sidley caldera from the southwest | |
| Highest point | |
| Elevation | 4,285 m (14,058 ft) |
| Prominence | 2,517 m (8,258 ft) |
| Listing | Volcanic Seven Summits Ultra |
| Coordinates | 77°02′S 126°06′W / 77.04°S 126.10°W |
| Geography | |
Mount Sidley Antarctica | |
| Location | Marie Byrd Land, Antarctica |
| Parent range | Executive Committee Range |
| Geology | |
| Mountain type | Shield volcano |
| Volcanic field | Marie Byrd Land Volcanic Province |
| Climbing | |
| First ascent | 1990 by Bill Atkinson (New Zealand) |
Mount Sidley is the highest dormant volcano in Antarctica, and a member of the Volcanic Seven Summits (the highest volcanoes on each of the seven continents) with a summit elevation of 4,181–4,285 metres (13,717–14,058 ft). It is a massive, mainly snow-covered shield volcano, and the highest of the five volcanoes that comprise the Executive Committee Range of Marie Byrd Land. The feature is marked by a 5-kilometre-wide (3.1 mi) caldera on the southern side and stands northeast of Mount Waesche in the southern part of the range.