Alagogshak
Alagogshak | |
---|---|
Highest point | |
Elevation | 5,495 ft (1,675 m)[1] |
Coordinates | 58°09′26″N 155°23′54″W / 58.1573°N 155.39839°WCoordinates: 58°09′26″N 155°23′54″W / 58.1573°N 155.39839°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 |
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 It is the only member of the Katmai volcanic group that is no longer active.[3]
See also[]
- List of volcanoes in the United States of America
References[]
- ^ Jump up to: a b "Alagogshak". Alaska Volcano Observatory. U.S. Geological Survey. Retrieved 15 February 2019.
- ^ 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.
- ^ Fierstein, Judy. "Katmai National Park Volcanoes". National Park Service. Retrieved 15 February 2019.
External links[]
- Alagogshak at the Alaska Volcano Observtory
- Alagogshak Volcano: A Pleistocene Andesite-Dacite Stratovolcano in Katmai National Park
Categories:
- Stratovolcanoes of the United States
- Mountains of Alaska
- Volcanoes of Alaska
- Volcanoes of Lake and Peninsula Borough, Alaska
- Mountains of Lake and Peninsula Borough, Alaska
- Aleutian Range
- Katmai National Park and Preserve