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Big Bunchgrass Volcano

Updated: Mar 28, 2024 14:11 GMT -
Pyroclastic cone 2024 m / 6640 ft
Oregon, United States, 42.7°N / -122.19°W
Current status: (probably) extinct (0 out of 5)

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Typical eruption style: unspecified
Big Bunchgrass volcano eruptions: None during the past 10,000 years
Less than few million years ago (Pleistocene)

Latest nearby earthquakes

No recent earthquakes
TimeMag. / DepthDistance / Location

Background

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.
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Source: Smithsonian / GVP volcano information

Big Bunchgrass Volcano Photos

Latest satellite images

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