Mount Kaguyak
| Mount Kaguyak | |
|---|---|
 Lake filled caldera of Kaguyak, August 1982. | |
| Highest point | |
| Elevation | 2,956 ft (901 m)[1] |
| Listing | List of volcanoes in the United States |
| Coordinates | 58°36′28.8″N 154°1′40.8″W / 58.608000°N 154.028000°W |
| Geography | |
  Mount Kaguyak Location within Alaska | |
| Parent range | Aleutian Range |
| Geology | |
| Formed by | Subduction zone volcanism |
| Stratovolcano | |
| Volcanic arc | Aleutian Arc[2] |
| Last eruption | 3850 BCE[3] |
Mount Kaguyak is a stratovolcano located in the northeastern part of the Katmai National Park and Preserve in the U.S. state of Alaska. The 2.5 kilometres (1.6 mi) wide caldera is filled by a more than 180 m deep crater lake. The surface of the crater lake lies about 550 m below the rim of the caldera. Postcaldera lava domes form a prominent peninsula in the center of the lake. The volcano is 901 metres (2,956 ft) high and is topographically prominent because it rises from lowland areas near sea level in the south of the Big River.
Based on radiocarbon dating the caldera-forming eruption occurred about 5800 years before present.[4] During this eruption at least 120 km2 (46 sq mi) were covered in a dacitic ignimbrite.[4]
References
[edit]- ↑ "Kaguyak Crater". Alaska Volcano Observatory. University of Alaska System. Retrieved December 24, 2017.
- ↑ Neal, Christina A.; McGimsey, Robert G. "Volcanoes of the Alaska Peninsula and Aleutian Islands, Alaska: selected photographs". U.S. Geological Survey Digital Data Series DDS-40. doi:10.3133/ds40.
- ↑ "Kaguyak". Global Volcanism Program. Smithsonian Institution. Retrieved December 24, 2017.
- 1 2 Fierstein, Judy (2007). "Explosive eruptive record in the Katmai region, Alaska Peninsula: an overview". Bulletin of Volcanology. 69 (5): 469–509. doi:10.1007/s00445-006-0097-y. ISSN 1432-0819.
| Authority control databases: Geographic |
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