Mount Siple is a
potentially active Antarctic
The Antarctic ( or , American English also or ; commonly ) is a polar region around Earth's South Pole, opposite the Arctic region around the North Pole. The Antarctic comprises the continent of Antarctica, the Kerguelen Plateau and othe ...
shield volcano
A shield volcano is a type of volcano named for its low profile, resembling a warrior's shield lying on the ground. It is formed by the eruption of highly fluid (low viscosity) lava, which travels farther and forms thinner flows than the more vi ...
, rising to and dominating the northwest part of
Siple Island
Siple Island is a long snow-covered island lying east of Wrigley Gulf along the Getz Ice Shelf off Bakutis Coast of Marie Byrd Land, Antarctica. Its centre is located at .
Its area is and it is dominated by the dormant shield volcano Mou ...
, which is separated from the
Bakutis Coast,
Marie Byrd Land
Marie Byrd Land (MBL) is an unclaimed region of Antarctica. With an area of , it is the largest unclaimed territory on Earth. It was named after the wife of American naval officer Richard E. Byrd, who explored the region in the early 20th centu ...
, by the
Getz Ice Shelf
The Getz Ice Shelf is the largest Antarctic ice shelf along the SE Pacific-Antarctic coastline, over long and from wide, bordering the Hobbs and Bakutis Coasts of Marie Byrd Land between the McDonald Heights and Martin Peninsula. Several lar ...
.
Its youthful appearance strongly suggests that it last erupted in the
Holocene
The Holocene ( ) is the current geological epoch. It began approximately 11,650 cal years Before Present (), after the Last Glacial Period, which concluded with the Holocene glacial retreat. The Holocene and the preceding Pleistocene togeth ...
. It is capped by a summit
caldera
A caldera ( ) is a large cauldron-like hollow that forms shortly after the emptying of a magma chamber in a volcano eruption. When large volumes of magma are erupted over a short time, structural support for the rock above the magma chamber is ...
, and
tuff cones lie on the lower flanks.
[ Recely Bluff is on the northeast slope of the mountain, about 7 nautical miles (13 km) from the peak. Its volume of is comparable to that of ]Mount Erebus
Mount Erebus () is the second-highest volcano in Antarctica (after Mount Sidley), the highest active volcano in Antarctica, and the southernmost active volcano on Earth. It is the sixth-highest ultra mountain on the continent.
With a sum ...
.
Mount Siple is named after Paul A. Siple (1908–68), a US Antarctic explorer and geographer who took part in six Antarctic expeditions, including the two Byrd expeditions of 1928-30 and 1933-35 (Siple Coast
Siple Coast () is the middle portion of the relatively ill-defined coast along the east side of the Ross Ice Shelf, between the north end of Gould Coast () and the south end of Shirase Coast (). The area was originally called Kirton Coast, but was ...
, Siple Island). He was in command of the West Base
West or Occident is one of the four cardinal directions or points of the compass. It is the opposite direction from east and is the direction in which the Sun sets on the Earth.
Etymology
The word "west" is a Germanic word passed into some R ...
of the US Antarctic Service
The United States Antarctic Program (or USAP; formerly known as the United States Antarctic Research Program or USARP and the United States Antarctic Service or USAS) is an organization of the United States government which has presence in the A ...
(USAS), 1939–41, and was navigator on all major exploratory flights from the base, including the flight on which Mount Siple was discovered.[
According to peaklist.org, the volcano was probably climbed, but there is no evidence of this and the summit may have been landed on by helicopter.
The volcano was visited in February 2017 as part of the Swiss Polar Institute's Antarctic Circumnavigation Expedition. ]Al Jazeera English
Al Jazeera English (AJE; ar, الجزيرة, translit=al-jazīrah, , literally "The Peninsula", referring to the Qatar Peninsula) is an international 24-hour English-language news channel owned by the Al Jazeera Media Network, which is o ...
Science and Technology editor Tarek Bazley was on board and filed a news report on his visit to a colony of Adele penguins breeding there.
See also
*List of volcanoes in Antarctica
This is a list of volcanoes in Antarctica.
Table
A 2017 study claimed to have found 138 volcanoes, of which 91 were previously unknown. Some volcanoes are entirely under the ice sheet. Unconfirmed volcanoes are not included in the table below.
...
*List of Ultras of Antarctica
This is a list of all the Ultra prominent peaks (with topographic prominence greater than 1,500 metres) in Antarctica. Some islands in the South Atlantic have also been included and can be found at the end of the list.
Antarctica
South At ...
*List of islands by highest point
This is a list of islands in the world ordered by their highest point; it lists islands with peaks by elevation. At the end of this article continental landmasses are also included for comparison.
Island countries and territories listed are tho ...
References
*
External links
Mount Siple
at skimountaineer.com
"Mount Siple, Antarctica" on Peakbagger
{{DEFAULTSORT:Siple
Polygenetic shield volcanoes
Calderas of Antarctica
Volcanoes of Marie Byrd Land
Potentially active volcanoes