geo.wikisort.org - Mountains

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 ago to about 43,000 years ago.[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 It is the only member of the Katmai volcanic group that is no longer active.[3]

Alagogshak
Alagogshak summit in 1997
Highest point
Elevation	5,495 ft (1,675 m)[1]
Coordinates	58°09′26″N 155°23′54″W
Geography
Location	Katmai National Park and Preserve, Alaska, U.S.
Parent range	Aleutian Range
Topo map	USGS Adak C-2
Geology
Mountain type	Stratovolcano
Volcanic arc/belt	Aleutian Arc

See also

• List of volcanoes in the United States of America

References

External links

• Alagogshak at the Alaska Volcano Observtory
• Alagogshak Volcano: A Pleistocene Andesite-Dacite Stratovolcano in Katmai National Park

---