Mount Washington (Oregon)

Mount Washington (Oregon)
Mount Washington
Elevation 7,794 ft (2,376 m) [1]
Prominence 2,554 ft (778 m) [1]
Location Deschutes / Linn counties, Oregon, USA
Range Cascade Range
Coordinates 44°19′56″N 121°50′19″W / 44.3321254°N 121.8385292°W / 44.3321254; -121.8385292Coordinates: 44°19′56″N 121°50′19″W / 44.3321254°N 121.8385292°W / 44.3321254; -121.8385292[2]
Topo map USGS Mount Washington
Type Shield volcano [3]
Age of rock Pleistocene
Volcanic arc/belt 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. U.S. National Geodetic Survey. Retrieved 2008-11-18. 
  3. ^ a b Wood, Charles A.; Jűrgen Kienle (1993). Volcanoes of North America. Cambridge University Press. pp. 181–182. ISBN 0-512-43811-X. 
  4. ^ "Mount Washington". Skiing the Cascade Volcanoes. Retrieved 2008-04-03. 

External links

A Winter Ascent of Mount Washington

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