Mount Washington
Schildvulkan 2376 m / 7,794 ft
Oregon (Canada and USA (mainland)), 44.33°N / -121.84°W
Aktueller Status: (wahrscheinlich) erloschen (0 von 5)
Oregon (Canada and USA (mainland)), 44.33°N / -121.84°W
Aktueller Status: (wahrscheinlich) erloschen (0 von 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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Ausbrüche: possibly ca. 1330 years ago
Letzte Erdbeben in der Nähe: Keine jüngeren Beben
Beschreibung
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).---
Source: Smithsonian / GVP volcano information
Siehe auch: Sentinel hub | Landsat 8 | NASA FIRMS
