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Belknap Crater

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Title: Belknap Crater  
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Subject: Volcanoes of Oregon, Mountains of Oregon, Belknap, Cascade Range, List of mountains of Oregon
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Belknap Crater

Belknap Crater
Belknap shield volcano with lava flows in foreground
Elevation 6,876 ft (2,096 m) NAVD 88[1]
Belknap Crater is located in Oregon
Belknap Crater
Linn County, Oregon, U.S.
Range Cascade Range
Coordinates [1]
Topo map USGS Mount Washington
Type Shield volcano
Volcanic arc Cascade Volcanic Arc
Last eruption 480 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

Name Elevation Coordinates
Belknap Crater[5] 6,876 ft (2,096 m) [1]
Inaccessible Cones[6] 4,869 ft (1,484 m)
Little Belknap[6] 6,306 ft (1,922 m) [7]
South Belknap Cone[6] 5,863 ft (1,787 m)
Twin Craters[6] 5,285 ft (1,611 m) [8]


 This article incorporates public domain material from websites or documents of the United States Forest Service.

  1. ^ a b c "Belknap Crater". NGS data sheet.  
  2. ^ "Belknap Shield Volcano, Oregon". Cascades Volcano Observatory. USGS. 2005-12-28. Retrieved 2008-08-12. 
  3. ^ "Belknap".  
  4. ^ a b "Oregon Volcanoes - Belknap Volcanic Field". Deschutes & Ochoco National Forests - Crooked River National Grassland,  
  5. ^ "Belknap".  
  6. ^ a b c d "Belknap Subfeatures".  
  7. ^ "Little Belknap".  
  8. ^ "Twin Craters".  
  • Harris, Stephen L. (2005). Fire Mountains of the West: The Cascade and Mono Lake Volcanoes (3rd ed.).  
  • Wood, Charles A.; Kienle, Jürgen (1990). Volcanoes of North America.  
  • Portions of this article include public domain text from the USFS Deschutes & Ochoco National Forests - Crooked River National Grassland.

External links

  • "Belknap Crater".  
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