Belknap Crater

Infobox Mountain
Name = Belknap Crater
Photo = Belknap.jpg
Caption = Belknap shield volcano with lava flows in foreground
Elevation = convert|6876|ft|m| [ cite web
url = http://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=QD1846
title = NGS Data Sheet for Belknap Crater
publisher = U.S. National Geodetic Survey
accessdate = 2008-03-31 ]
Location = Linn County, Oregon, USA
Range = Cascades
Coordinates = coord|44.2842848|-121.8428303|format=dms|region:US_type:mountain [GNIS|1137894]
Topographic
USGS Mount Washington
Type = Shield volcano
Volcanic_Arc/Belt = Cascade Volcanic Arc
Age =
Last eruption = about 1500 years ago [cite web | title = DESCRIPTION: Belknap Shield Volcano, Oregon | work = Cascades Volcano Observatory | publisher = United States Geological Survey | date = 2005-12-28 | url = http://vulcan.wr.usgs.gov/Volcanoes/Belknap/description_belknap.html | accessdate = 2008-08-12]
Easiest route = hike

Portions of this article include public domain text from the USFS [http://www.fs.fed.us/r6/centraloregon/geology/info/volcanoes/belknap.shtml Deschutes & Ochoco National Forests - Crooked River National Grassland] .

Belknap Crater is a shield volcano in the Cascade Range in Oregon, USA.VNUM|1=1202-06-|2=Belknapaccessdate|2008-05-14] It is within the Mount Washington Wilderness area.

Belknap volcano is an great Holocene example of the process which built the High Cascade Platform during the Pleistocene. Small shield volcanoes with a capping cinder cone.

A number of other eruptions also occurred in the general area during roughly the same time period. About 1,300 calendar years ago (1,330 ¹⁴C years B.P.) a series of small spatter conespatter 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 there are a number of 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 calendar yrs old (1,980 ¹⁴C years B.P.) while Collier is dated at about 1,500 calendar yrs old (1,600 ¹⁴C years B.P.)cite web | title = Oregon Volcanoes - Belknap Volcanic Field | work = Deschutes & Ochoco National Forests - Crooked River National Grassland | publisher = United States Forest Service | date = 2003-11-26 | url = http://www.fs.fed.us/r6/centraloregon/geology/info/volcanoes/belknap.shtml | accessdate = 2008-05-14]

Notable Vents

References

* cite book
last = Harris
first = Stephen L.
title = Fire Mountains of the West: The Cascade and Mono Lake Volcanoes (3rd ed.)
publisher = Mountain Press Publishing Company
date = 2005
pages= pp. 195–8
isbn = 0-87842-511-X
* cite book
last = Wood
first = Charles A.
coauthors = Jürgen Kienle, eds.
title = Volcanoes of North America
publisher = Cambridge University Press
date = 1990
pages = pp. 182–3
isbn = 0-521-43811-X