The Devils Hill chain of lava domes and flows erupted along a 5-km-long fissure on the SE flank of South Sister about 2,000 years ago, and can be seen diagonally across the center of this view to the NW. A similar, but more localized eruption produced the Rock Mesa lava flow, the light-colored area to the upper left. The eroded peak of The Husband volcano is in the distance.

Photo by Lee Siebert, 1982 (Smithsonian Institution).

This image is made available under the Public Domain Dedication CC0 license, but proper attribution is appreciated.

Galleries: Lava Domes

Keywords: lava dome | fissure

Three Sisters