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Big Bunchgrass volcano

Pyroclastic cone 2024 m / 6640 ft
Oregon, United States, 42.7°N / -122.19°W
Current status: (probably) extinct (0 out of 5) | Reports
Big Bunchgrass volcano books
Typical eruption style: unspecified
Big Bunchgrass volcano eruptions: None during the past 10,000 years
Less than few million years ago (Pleistocene) No recent earthquakes
TimeMag. / DepthDistanceLocation


The basaltic Big Bunchgrass pyroclastic cone was considered to be of Holocene age (Sarna-Wojcicki et al. 1983, Smith 1988). The age assignment of Smith was based on lack of observation of Mazama tephra at Big Bunchgrass, but Sherrod (1995 pers. comm.) has found overlying Mazama tephra, and considers Big Bunchgrass to be substantially older than Holocene based on degree of erosion.
Source: Smithsonian / GVP volcano information

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See also: Sentinel hub | Landsat 8

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