The western terminus of the Hoffman dacite lava flow forms a steep blocky slope up to about 50 m in height. The flows originated from six or more NW-SE-trending vents. The larger of the two flows (seen here) was erupted near the eastern caldera rim and flowed primarily west into the caldera, although a smaller portion traveled to the east.

Photo by Lee Siebert, 1998 (Smithsonian Institution).

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

Keywords: lava flow

Medicine Lake