Yantarni Volcano
Yantarni | |
---|---|
![]() Yantarni volcano, September 1985 | |
Highest point | |
Elevation | 4,383 ft (1,336 m) |
Coordinates | 57°01′05″N 157°11′00″W / 57.01806°N 157.18333°W |
Geography | |
Location | Alaska Peninsula, Alaska, U.S. |
Parent range | Aleutian Range |
Topo map | USGS Ugashik A-4 |
Geology | |
Mountain type | Stratovolcano |
Volcanic arc/belt | Aleutian Arc |
Last eruption | 800 BCE ± 500 years |
Yantarni Volcano is an andesitic stratovolcano in the U.S. state of Alaska. It is on the Alaska Peninsula, in the Aleutian Range, between Mount Aniakchak and Mount Chiginagak volcanoes.[1] The volcano was not discovered until 1979 due to its remote location, lack of documented historic activity, and its rather modest summit elevation. The mountain was named after nearby , which in turn was named by Russian explorers after the abundance of yantar in the area.[2]
Geology[]
The current cycle of eruptive activity began in middle Pleistocene time with extrusion of andesitic lava flows, perhaps from multiple vents. By the late Pleistocene, central-vent volcanism had initiated construction of a small stratovolcano.[3]
800 BCE ± 500 years eruption[]
The cone was breached sometime in the late Holocene, between 2 and 3.5 ka, during the only Holocene event.[3] The eruption was similar to that of Mount St. Helens.[4] and was followed by the emplacement of 1 cu km of pyroclastic flows related to growth of the summit lava dome.[1] It had a Volcanic Explosivity Index of 5[5]
![](http://upload.wikimedia.org/wikipedia/commons/thumb/2/2c/Map_of_alaska_volcanoes_yantarni.jpg/250px-Map_of_alaska_volcanoes_yantarni.jpg)
Notes[]
- ^ Jump up to: a b "Yantarni". Global Volcanism Program. Smithsonian Institution.
- ^ "Yantarni - Introduction". Alaska Volcano Observatory. Retrieved 31 October 2010.
- ^ Jump up to: a b "Yantarni description and statistics". Alaska Volcano Observatory. Retrieved 2009-06-13.
- ^ Yantarni Volcano - Volcanolive.com
- ^ "Yantarni (Eruptive History)". Global Volcanism Program. Smithsonian Institution. Retrieved 2009-06-13.
Sources[]
- Volcanoes of Lake and Peninsula Borough, Alaska
- Mountains of Lake and Peninsula Borough, Alaska
- Stratovolcanoes of the United States
- Mountains of Alaska
- Volcanoes of Alaska
- VEI-5 volcanoes
- Aleutian Range
- Lake and Peninsula Borough, Alaska geography stubs