Global Volcanism Program | Image GVP-06596
This crater on the SE rim of Medicine Lake caldera formed around 5,100 years ago. The eruption produced tephra and spatter with localized lava flows from a NE-trending alignment of pit craters.
Photo by Lee Siebert, 1998 (Smithsonian Institution).
This image is made available under the Public Domain Dedication CC0 license, but proper attribution is appreciated.