North Sister Volcano - John Seach
Oregon, USA

44.17 N, 121.77 W
summit elevation 3074 m
Complex volcano

North Sister Volcano is part of the Three Sisters Group and is located in central Oregon Cascades.
The central plug of the volcano is eroded by glacial action.

Eruptions of North Sister Volcano
440 AD ± 150, 40 AD ± 200, 800 BC?, 7350 BC ± 1000, 
 
 

North Sister Volcano
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