Belknap Crater
| Belknap Crater | |
|---|---|
 Belknap shield volcano with lava flows in foreground |
|
| Elevation | 6,876 ft (2,096 m) NAVD 88[1] |
| Location | |
| Location | Linn County, Oregon USA |
| Range | Cascade Range |
| Coordinates | 44°17′05.79″N 121°50′32.03″W / 44.2849417°N 121.8422306°WCoordinates: 44°17′05.79″N 121°50′32.03″W / 44.2849417°N 121.8422306°W[1] |
| Topo map | USGS Mount Washington |
| Geology | |
| Type | Shield volcano |
| Volcanic arc/belt | Cascade Volcanic Arc |
| Last eruption | c. 500 CE[2] |
Belknap Crater is a shield volcano in the Cascade Range in the U.S. state of Oregon.[3]
Belknap volcano is a Holocene example of the process which built the High Cascade Platform during the Pleistocene. It is a small shield volcano with a capping cinder cone.[4]
A number of other eruptions also occurred in the general area during roughly the same time period. About 1,300 years ago (1,330 14C years B.P.) a series of small spatter cones formed between Belknap and Blue Lake. North of these, a phreatic explosion blasted out the crater which is today occupied by Blue Lake. To the south are several cinder cones and associated lava flows, including Collier, Four-in-One, and Yapoah cones. Four-in-One Cone has been dated at about 1,900 years old (1,980 14C years B.P.) while Collier is dated at about 1,500 years old (1,600 14C years B.P.)[4]
[edit] Notable vents
| Name | Elevation | Coordinates | Last eruption |
| Blue Lake[4] | - | - | - |
| Spatter Cone Chain[4] | - | - | - |
| Belknap Crater[4] | - | - | - |
| Little Belknap[4] | - | - | - |
| South Belknap Cone[4] | - | - | - |
| Yapoah Cone[4] | - | - | - |
| Four-in-One Cone[4] | - | - | ~1,900 years ago |
| Collier Cone[4] | - | - | ~1,500 years ago |
[edit] References
- ^ a b "Belknap Crater". NGS data sheet. U.S. National Geodetic Survey. http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=QD1846. Retrieved 2008-03-31.
- ^ "Belknap Shield Volcano, Oregon". Cascades Volcano Observatory. USGS. 2005-12-28. http://vulcan.wr.usgs.gov/Volcanoes/Belknap/description_belknap.html. Retrieved 2008-08-12.
- ^ "Belknap". Global Volcanism Program, Smithsonian Institution. http://www.volcano.si.edu/world/volcano.cfm?vnum=1202-06-. Retrieved 2008-12-21.
- ^ a b c d e f g h i j "Oregon Volcanoes - Belknap Volcanic Field". Deschutes & Ochoco National Forests - Crooked River National Grassland. United States Forest Service. 2003-11-26. http://www.fs.fed.us/r6/centraloregon/geology/info/volcanoes/belknap.shtml. Retrieved 2008-05-14.
- Harris, Stephen L. (2005). Fire Mountains of the West: The Cascade and Mono Lake Volcanoes (3rd ed.). Mountain Press Publishing Company. pp. 195–8. ISBN 0-87842-511-X.
- Wood, Charles A.; Jürgen Kienle, eds. (1990). Volcanoes of North America. Cambridge University Press. pp. 182–3. ISBN 0-521-43811-X.
- Portions of this article include public domain text from the USFS Deschutes & Ochoco National Forests - Crooked River National Grassland.
[edit] External links
Media related to Collier Cone at Wikimedia Commons- "Belknap Crater". Geographic Names Information System, U.S. Geological Survey. http://geonames.usgs.gov/pls/gnispublic/f?p=gnispq:3:::NO::P3_FID:1137894. Retrieved 2008-11-08.
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