The Wizard Island cone formed while the lake was still filling the Crater Lake caldera. The cone grew near the western structural margin of the caldera on top of a broader central platform of lava flows, and the visible portion represents about 2% of post-caldera eruptive products, the rest of which are below the lake surface.

Photo by Lee Siebert, 1997 (Smithsonian Institution).

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

Keywords: caldera | cone | crater lake | scoria cone

Crater Lake