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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

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 Photos:

View onto Cemoro Lawang village on the caldera rim (Photo: Tom Pfeiffer)
View onto Cemoro Lawang village on the caldera rim (Photo: Tom Pfeiffer)
A barrage of bombs hits the water, some quite far from the shore. (Photo: Iris Karinkanta)
A barrage of bombs hits the water, some quite far from the shore. (Photo: Iris Karinkanta)
The Tengger caldera in the morning (Photo: Tom Pfeiffer)
The Tengger caldera in the morning (Photo: Tom Pfeiffer)
 



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