Crooked River caldera
The Crooked River caldera is a large and ancient volcano that straddles three central Oregon counties. The diameter of the caldera is about 41 km x 27 km and is notable for the welded tuff present at Gray Butte, Smith Rock, Powell Buttes, Grizzly Mountain and Barnes Butte. The volcano is considered extinct and last erupted about 29.5 Ma.[1]
| Crooked River caldera | |
|---|---|
  Crooked River caldera | |
| Highest point | |
| Coordinates | 44°18′N 120°54′W |
| Geography | |
| Location | Deschutes, Crook, and Jefferson counties, Oregon, U.S. |
| Geology | |
| Age of rock | 29.5 Ma |
| Mountain type | Caldera |
References
- "Field trip guide to the Oligocene Crooked River caldera: Central Oregon's Supervolcano, Crook, Deschutes, and Jefferson Counties, Oregon" (PDF). Oregon Geology. Oregon Department of Geology and Mineral Studies. 2009. Retrieved 2014-12-29.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.