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′06″N 121°50′32″W / 44.284943458°N 121.842233094°WCoordinates: 44°17′06″N 121°50′32″W / 44.284943458°N 121.842233094°W[1] |
| Topo map | USGS Mount Washington |
| Geology | |
| Type | Shield volcano |
| Volcanic arc | 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]
Notable vents [edit]
| Name | Elevation | Coordinates |
| Belknap Crater[5] | 6,876 ft (2,096 m) | 44°17′06″N 121°50′32″W / 44.284943458°N 121.842233094°W[1] |
| Inaccessible Cones[6] | 4,869 ft (1,484 m) | 44°18′12″N 121°54′23″W / 44.30331°N 121.90649°W |
| Little Belknap[6] | 6,306 ft (1,922 m) | 44°16′57″N 121°49′34″W / 44.2826179°N 121.8261628°W[7] |
| South Belknap Cone[6] | 5,863 ft (1,787 m) | 44°16′03″N 121°50′42″W / 44.26751°N 121.84507°W |
| Twin Craters[6] | 5,285 ft (1,611 m) | 44°15′12″N 121°53′09″W / 44.2534523°N 121.8858860°W[8] |
References [edit]
This article incorporates public domain material from websites or documents of the United States Forest Service.
- ^ a b c "Belknap Crater". NGS data sheet. U.S. National Geodetic Survey. Retrieved 2008-03-31.
- ^ "Belknap Shield Volcano, Oregon". Cascades Volcano Observatory. USGS. 2005-12-28. 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 "Oregon Volcanoes - Belknap Volcanic Field". Deschutes & Ochoco National Forests - Crooked River National Grassland, United States Forest Service. Archived from the original on 2010-11-09.
- ^ "Belknap". Global Volcanism Program, Smithsonian Institution. http://www.volcano.si.edu/world/volcano.cfm?vnum=1202-06-.
- ^ a b c d "Belknap Subfeatures". Global Volcanism Program, Smithsonian Institution. http://www.volcano.si.edu/world/volcano.cfm?vnum=1202-06-%26volpage%3Dsynsub.
- ^ "Little Belknap". Geographic Names Information System, U.S. Geological Survey.
- ^ "Twin Craters". Geographic Names Information System, U.S. Geological Survey.
- 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.; Kienle, Jürgen (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.
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Wikimedia Commons has media related to: Collier Cone |
External links [edit]
- "Belknap Crater". Geographic Names Information System, U.S. Geological Survey. Retrieved 2008-11-08.
