Dotsero
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| Dotsero[1] | |
|---|---|
 Dotsero maar in central Colorado near the junction of the Colorado and Eagle rivers. |
|
| Elevation | 7,316 ft (2,230 m) |
| Location | Dotsero, Colorado, USA |
| Coordinates | |
| Type | maar |
| Last eruption | 2200 BC ± 300 years |
Dotsero is a 700 meter wide by 400 meter 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.[1] Erupting approximately 4200 years ago, it is the youngest volcano in Colorado. It is currently dormant.
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] It is one of the youngest eruptions in the continental U.S. and it produced an explosion crater, a lahar, and a 3-kilometer long lava flow. 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.
[edit] Notes
[edit] References
- ^ a b Smithsonian Institution Global Volcanism Program: Dotsero
- ^ Wood, and Kienle. "America's Volcanic Past, Colorado." USGS. 4 Feb. 2003. UVO. http://vulcan.wr.usgs.gov/LivingWith/VolcanicPast/Places/volcanic_past_colorado.html
- Wood, Charles A., and Jurgen Kienle. "Volcanos of North America: United States and Canada." Cambridge: Press Syndicate of the University of Cambridge, 1990
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