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Data from the Global Volcanism Program of the Smithsonian Institution
Details for: West Crater
West Crater is a Quaternary volcanic field in the southern Cascades of Washington between Mount St. Helens and Mount Hood. West Crater itself, seen here from the NE, is an andesite lava dome with two small lava flows, one of which forms the bare area in the center. The 290-m-high dome formed about 8,000 years ago on the floor of a cirque carved into older Tertiary volcanic rocks. The West Crater volcanic field consists of a series of small shield volcanoes and scoria cones along a NW-SE zone. Photo by Lee Siebert, 2002 (Smithsonian Institution).
Volcano Number:
321060
Volcano Name:
West Crater
Country:
United States
Volcano Type:
Volcanic field
Last Eruption:
5750 BCE
Elevation:
1329m
Tectonic Setting:
Subduction zone / Continental crust (> 25 km)
Pop. within 5km:
505
Pop. within 10km:
505
Pop. within 30km:
14359
Pop. within 100km:
2225092
Latitude:
45.88
Longitude:
-122.08
Details
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West Crater, a small andesitic lava dome with associated lava flows, is part of a Quaternary volcanic field in southern Washington consisting primarily of small basaltic and basaltic andesite cinder cones and shield volcanoes, oriented along a NW-SE zone to the SE of St. Helens. This 20-km-wide zone extends from Marble Mountain, north of Swift Reservoir, to south of Trout Creek Hill. The Pleistocene basaltic Trout Creek Hill shield volcano produced a lava flow about 340,000 years ago that traveled 20 km SE, temporarily damming the Columbia River. At least three vents in this field are of Holocene age: West Crater, a small cone at Hackamore Creek, and a phreatic crater at the summit of Bare Mountain. The latest eruptions at these locations have been dated at about 8,000 years before present, and have included emplacement of an andesitic lava dome and associated lava flow at West Crater and formation of a phreatic explosion crater at Bare Mountain.
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Eruption Data from the Global Volcanism Program of the Smithsonian Institution
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Emissions Data from the Global Volcanism Program of the Smithsonian Institution
Sorry. No emissions data found for this volcano.
Data from the Earthchem Library
Sorry. No data exist for this volcano in the EarthChem Library.
Data from the Earthchem Portal
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Data from the SESAR Database
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Data from the MaGa Database
Sorry. No data exist for this volcano in the MaGa database.
Data from UNAVCO
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Data from USIEI
Sorry. This volcano is not covered by any USIEI projects
Data from IRIS FDSNWS
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