Sinker Butte Volcano
Updated: Apr 20, 2024 11:49 GMT -
Shield 1012 m / 3320 ft
Idaho, United States, 43.25°N / -116.62°W
Current status: (probably) extinct (0 out of 5)
Idaho, United States, 43.25°N / -116.62°W
Current status: (probably) extinct (0 out of 5)
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Sinker Butte volcano eruptions: None during the past 10,000 years
Less than few million years ago (Pleistocene)
Latest nearby earthquakes
Time | Mag. / Depth | Distance / Location |
Background
A Pleistocene shield volcano and tuff cone in the western Snake River Plain, Sinker Butte, is partially dissected by the Snake River Canyon. Lava flows from the tuff cone flowed up to 10 km to the south. A broad lava shield is overlain by a large tuff cone that is capped with lava flows and welded spatter. Ar-Ar dates of 1.25 and 1.17 Ma were obtained from basalts directly below phreatomagmatic tephra and capping basalts, respectively.---
Source: Smithsonian / GVP volcano information