Devil's Backbone is a segmented dike that rises nearly 400 m from the shore of Crater Lake in the western rim of the caldera. The andesite dike was a feeder for a vent that was near Mount Hillman but has since been removed by glacial erosion.

Photo by Lee Siebert, 1981 (Smithsonian Institution)

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

Keywords: dike | caldera | outcrop | geology | stratigraphy

Crater Lake