Fisher Caldera
Fisher Caldera, also known as Mount Fisher and Fisher Volcano, is a large volcanic caldera, measuring about 6.8 miles (11 km) by 11 miles (18 km), located on Unimak Island in the Aleutian Islands of Alaska.[1] Formed by the destructive eruption of an andesitic stratovolcano about 9,100 years ago,[1] it contains three crater lakes, one 2 miles (3.2 km) wide and two others about 1.5 miles (2.4 km) wide. Small peaks rising 2,000 feet (600 m) and 2,031 feet (619 m) are also present in the caldera. Fisher Caldera is located just 13 miles (21 km) from the Mount Westdahl volcano.
| Fisher Caldera | |
|---|---|
 Satellite picture of Unimak Island with Fisher Caldera | |
| Highest point | |
| Elevation | 3,648 ft (1,112 m)[1] |
| Coordinates | 54°40′N 164°23′W |
| Geography | |
| Location | Unimak Island, Alaska, United States |
| Parent range | Aleutian Range |
| Topo map | USGS Unimak C4 |
| Geology | |
| Mountain type | Stratovolcano remnant |
| Volcanic arc/belt | Aleutian Arc |
| Last eruption | August 1830 |
The largest volcanic eruption on Earth during the Holocene Epoch (the last 11,700 years) occurred at Fisher Caldera in 8700 BCE.[2]
Maps of Alaskan volcanoes with Fisher Caldera
References
- "Fisher Caldera Description and Information". Alaska Volcano Observatory. 4 June 2012. Retrieved 15 August 2012.
- Oppenheimer, Clive (2011). "Appendix A". Eruptions that Shook the World. Cambridge: Cambridge University Press. pp. 355–356. ISBN 978-0-521-64112-8.
External links
- "Fisher". Global Volcanism Program. Smithsonian Institution. Retrieved 2021-06-27.
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