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Mount Washington (Oregon)

Mount Washington
Mount Washington from Big Lake
Elevation 7,794 ft (2,376 m)[1]
Prominence 2,554 ft (778 m)[1]
Location Deschutes / Linn counties, Oregon, U.S.
Range Cascade Range
Coordinates [2]
Topo map USGS Mount Washington
Type Shield volcano[3]
Age of rock Pleistocene
Volcanic arc Cascade Volcanic Arc
Last eruption About 670 AD
First ascent 1923 by E. McNeal and party[4]

Mount Washington is a deeply eroded shield volcano in the Cascade Range of Oregon. The mountain dates to the Late Pleistocene. However, it does have a line of basaltic andesite spatter cones on its northeast flank which are approximately 1,330 years old according to carbon dating. The main peak is a volcanic plug that was heavily eroded by glaciers in the last ice age.[3]

See also


  1. ^ a b "Mount Washington, Oregon". Retrieved 2008-04-03. 
  2. ^ "Mount Washington". NGS data sheet.  
  3. ^ a b Wood, Charles A.; Kienle, Jűrgen (1993). Volcanoes of North America.  
  4. ^ "Mount Washington". Skiing the Cascade Volcanoes. Retrieved 2008-04-03. 

External links

  • Media related to at Wikimedia Commons
  • "Mount Washington".  
  • "Mount Washington Volcano, Oregon".  
  • "Washington, Oregon". Volcano World. Retrieved 2008-04-03. 

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