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Frosty Peak Volcano, also known as Mt. Frosty, Frosty Volcano, or Cold Bay Volcano, is a 6,299 ft (1,920 m) stratovolcano at the southwest end of the Alaska Peninsula in the
U.S. state
In the United States, a state is a constituent political entity, of which there are 50. Bound together in a political union, each state holds governmental jurisdiction over a separate and defined geographic territory where it shares its sove ...
of Alaska
Alaska ( ; russian: Аляска, Alyaska; ale, Alax̂sxax̂; ; ems, Alas'kaaq; Yup'ik: ''Alaskaq''; tli, Anáaski) is a state located in the Western United States on the northwest extremity of North America. A semi-exclave of the U.S. ...
.
History
Frosty Peak is the tallest and most recently formed peak of the volcanic complex. Its exact age is unknown, but it was probably formed in the middle to latePleistocene
The Pleistocene ( , often referred to as the ''Ice age'') is the geological epoch that lasted from about 2,580,000 to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was finally confirmed in ...
, and possibly erupted even more recently. Frosty Peak is the southern cone of the double-coned Frosty Volcano, which formed in the middle Pleistocene
The Chibanian, widely known by its previous designation of Middle Pleistocene, is an age in the international geologic timescale or a stage in chronostratigraphy, being a division of the Pleistocene Epoch within the ongoing Quaternary Period. Th ...
some time before the Wisconsin Glaciation
The Wisconsin Glacial Episode, also called the Wisconsin glaciation, was the most recent glacial period of the North American ice sheet complex. This advance included the Cordilleran Ice Sheet, which nucleated in the northern North American Cord ...
.
Frosty Volcano itself is located on the northern flank of an even older volcano, the Morzhovoi Volcano. Morzhovoi Volcano was probably formed in the early to middle Pleistocene, and collapsed into a 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 ...
. The highest points that remain from the caldera are called North and South Walrus Peak.
See also
*List of volcanoes in the United States of America
A list of volcanoes in the United States and its territories.
Alaska
American Samoa
Arizona
California
Colorado
Hawaii
/
Volcanoes of the Alaska Peninsula and Aleutian Islands-Selected Photographs
Alaska Volcano Observatory
Volcanoes of Aleutians East Borough, Alaska Stratovolcanoes of the United States Mountains of Alaska Volcanoes of Alaska Aleutian Range Mountains of Aleutians East Borough, Alaska Pleistocene stratovolcanoes {{AleutiansEastAK-geo-stub
List of Stratovolcanoes
A list of stratovolcanoes follows below.
Africa
Cameroon
* Mount Cameroon
Democratic Republic of Congo
* Mount Nyiragongo, Goma; designated as a Decade Volcano
** It contains an active lava lake inside its crater which overflowed due t ...
References
External links
*Volcanoes of the Alaska Peninsula and Aleutian Islands-Selected Photographs
Alaska Volcano Observatory
Volcanoes of Aleutians East Borough, Alaska Stratovolcanoes of the United States Mountains of Alaska Volcanoes of Alaska Aleutian Range Mountains of Aleutians East Borough, Alaska Pleistocene stratovolcanoes {{AleutiansEastAK-geo-stub