Clear Lake Volcanic Field
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| Clear Lake Volcanic Field | |
|---|---|
| Elevation | 4,724 ft (1,440 m) [1] |
| Location | |
| Location | Lake County, California, USA |
| Range | North Coast Ranges |
| Coordinates | 38°58′N 122°46′W / 38.97°N 122.77°W[2] |
| Topo map | USGS Kelseyville |
| Geology | |
| Type | lava domes, cinder cones, maars within volcanic field[2] |
| Age of rock | less than 2.1 million years[3] |
| Last eruption | Holocene[2] |
The Clear Lake Volcanic Field is a volcanic field beside Clear Lake in California's northern Coast Ranges. The site of late-Pliocene to early Holocene activity, the volcanic field consists of lava domes, cinder cones, and maars with eruptive products varying from basalt to rhyolite.[2] Cobb Mountain and Mount Konocti are the two highest peaks in the volcanic field, at 4,724 feet (1,440 m)[1] and 4,285 feet (1,306 m)[4] respectively.
The field's magma chamber also powers a geothermal field called The Geysers, which hosts the largest complex of geothermal power plants in the world.[5] These can generate approximately 2000 megawatts, enough to power two cities the size of San Francisco.[3]
[edit] References
- ^ a b U.S. Geological Survey Geographic Names Information System: Cobb Mountain. Retrieved 2008-08-19.
- ^ a b c d "Clear Lake". Global Volcanism Program, Smithsonian Institution. http://www.volcano.si.edu/world/volcano.cfm?vnum=1203-10-. Retrieved 2008-08-19.
- ^ a b Wood, Charles A.; Jűrgen Kienle (1993). Volcanoes of North America. Cambridge University Press. pp. 226–229. ISBN 0-512-43811-X.
- ^ U.S. Geological Survey Geographic Names Information System: Mount Konocti. Retrieved 2008-08-19.
- ^ W. Jacquelyne Kious; Robert I. Tilling (1996-02) (PDF). This Dynamic Earth: The Story of Plate Tectonics: USGS General Interest Publication. 1.13. United States Geological Survey. pp. 98. http://pubs.usgs.gov/gip/dynamic/dynamic.pdf. Retrieved 2009-01-06.
[edit] External links
- Clear Lake Volcanic Field, California, Cascades Volcano Observatory, United States Geological Service
- The Geysers, Calpine
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