Mount Washington volcano

shield volcano 2376 m / 7,794 ft
Oregon, Canada and USA (mainland), 44.33°N / -121.84°W
Current status: (probably) extinct (0 out of 5)

Mount Washington is a composite 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, formed by an andesitic lava dome is strongly eroded by glacial action during the last ice age.

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Typical eruption style: effusive
Mount Washington volcano eruptions: possibly ca. 1330 years ago

Latest nearby earthquakes

No recent earthquakes
TimeMag. / DepthDistance/Location

Background

Mount Washington is an eroded Pleistocene basaltic-andesite shield volcano capped by a steep-sided central plug that is the most prominent landmark between North Sister and Three Fingered Jack volcanoes. The Cache Mountain cinder cones lie to the NE, and the Hayrick Butte tuya and the Recent cinder cone Hoodoo Butte to the NW. A series of aligned spatter cones on the NE flank along a regional fissure that extends to about 4 km from the summit erupted about 1300 years ago, but ejecta from this chain is petrographically similar to Blue Lake Crater ejecta and is considered to have erupted at the same time (Sherrod et al., 2004).
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Source: Smithsonian / GVP volcano information

Mount Washington Photos

Mount Rainier, Washington, near the "Sunrise" section of Mount Rainier National Park
6 October, 2009 (Photo: volcanomike)
Mount Rainier, Washington, near the "Sunrise" section of Mount Rainier National Park
6 October, 2009 (Photo: volcanomike)
Mount Rainier, Washington, at sunset from downtown Seattle (top of the Space Needle).
5 October, 2009 (Photo: volcanomike)
Mount Rainier, Washington, at sunset from downtown Seattle (top of the Space Needle).
5 October, 2009 (Photo: volcanomike)
 



See also: Sentinel hub | Landsat 8
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