Mount Washington (Oregon)

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Mount Washington
Mount Washington Oregon.jpg
Elevation 7,794 ft (2,376 m)[1]
Prominence 2,554 ft (778 m)[1]
Location
Location Deschutes / Linn counties, Oregon, U.S.
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
Geology
Type Shield volcano[3]
Age of rock Pleistocene
Volcanic arc Cascade Volcanic Arc
Last eruption About 670 AD
Climbing
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[edit]

References[edit]

  1. ^ a b "Mount Washington, Oregon". Peakbagger.com. 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.; Kienle, Jűrgen (1993). Volcanoes of North America. Cambridge University Press. pp. 181–182. ISBN 0-521-43811-X. 
  4. ^ "Mount Washington". Skiing the Cascade Volcanoes. Retrieved 2008-04-03. 

External links[edit]