Alagogshak

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Alagogshak
Alagogshak crater AVO.jpg
Alagogshak summit in 1997
Highest point
Elevation5,495 ft (1,675 m)[1]
Coordinates58°09′26″N 155°23′54″W / 58.1573°N 155.39839°W / 58.1573; -155.39839Coordinates: 58°09′26″N 155°23′54″W / 58.1573°N 155.39839°W / 58.1573; -155.39839
Geography
LocationKatmai National Park and Preserve, Alaska, U.S.
Parent rangeAleutian Range
Topo mapUSGS Adak C-2
Geology
Mountain typeStratovolcano
Volcanic arc/beltAleutian Arc

Alagogshak is a stratovolcano, located on the Alaska Peninsula, United States, in Katmai National Park and Preserve. It is the oldest of the volcanoes in the vicinity of the Valley of Ten Thousand Smokes. The volcano was recognized as a separate feature from Mount Martin in 1997. The Holocene Mount Martin stands partly on Alagogshak's deeply eroded edifice, about 3 kilometres (1.9 mi) northeast of the Alagogshak vent. Alagogshak was last active in Pleistocene time, and was active from about 680,000 years before present to about 43,000 years before present.[1][2] The remnant summit crater consists of hydrothermally altered rock. It is the only member of the Katmai volcanic group that is no longer active.[3]

Map showing volcanoes of Alaska Peninsula.

See also[]

  • List of volcanoes in the United States of America

References[]

  1. ^ Jump up to: a b "Alagogshak". Alaska Volcano Observatory. U.S. Geological Survey. Retrieved 15 February 2019.
  2. ^ Hildreth, Wes; Fierstein, Judy; Lanphere, Marvin A.; Siems, David F. (1997). "Alagogshak Volcano: A Pleistocene Andesite-Dacite Stratovolcano in Katmai National Park" (PDF). Alaska Volcano Observatory. U.S. Geological Survey. Retrieved 15 February 2019.
  3. ^ Fierstein, Judy. "Katmai National Park Volcanoes". National Park Service. Retrieved 15 February 2019.

External links[]

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