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| Dotsero | |
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 Dotsero maar in central Colorado near the junction of the Colorado and Eagle rivers. |
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| Elevation | 7,316 ft (2,230 m)[1] |
| Location | Dotsero, Colorado, USA |
| Coordinates | [1] |
| Type | maar[1] |
| Age of rock | Holocene[1] |
| Last eruption | 2200 BC ± 300 years[1] |
Dotsero is a 700-meter (2,300 ft) wide by 400-meter (1,300 ft) deep maar volcano located in Dotsero, Colorado near the Colorado River and the Eagle River. It is classified as a scoria cone with evaporitic rock, basaltic tephra, and oxidized sandstone. Erupting approximately 4200 years ago, it is the youngest volcano in Colorado. It is currently dormant.[1]
Nearby Landmarks: Triangle Peak and Willow Peak. West of the Gore Range. Interstate 70 cuts across the lava flow.
Eruption information
Dotsero last erupted 4200 years ago, which places this volcano as a Holocene volcano erupting in the year 2220 ± 300 years B.C. This date is based upon a Carbon-14 date from wood found underneath some scoria.[2][3] It is one of the youngest eruptions in the continental U.S. and it produced an explosion crater, a lahar, and a 3-kilometer (1.9 mi) long lava flow.citation needed When Dotsero blew, it created small scoria cones that were constructed along a NNE-SSW line on either side of the maar. Dotsero also created two narrow V-shaped valleys.citation needed
External links
References
- ^ a b c d e f Smithsonian Institution Global Volcanism Program: Dotsero. Retrieved on 2008-08-20.
- ^ "America's Volcanic Past - Colorado" (HTML). Cascades Volcano Observatory. United States Geological Survey (2003-02-04). Retrieved on 2008-08-20.
- ^ Wood, Charles A.; Jurgen Kienle (1990). Volcanos of North America: United States and Canada. Cambridge University Press.
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