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Belknap Crater
Crater
in
Willamette NF
,
Mount Washington Wilderness
,
Cascade Range
near
Sisters
,
OR
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On Wikipedia
Belknap Crater is a shield volcano in the Cascade Range in the U.S. state of Oregon. 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. 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…
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