An aerial view shows the Military Pass lava flow on NE side of Mount Shasta, the longest known lava flow from the volcano, erupted about 9,200 years ago. It originated near the summit of the Hotlum cone and reached about 9 km, with a thickness of about 150 m thick near its terminus. The flow overlies the Red Banks pumice and a broad fan of pyroclastic flow deposits that were formed around 9,700 years ago.

Photo by Dan Miller, 1980 (U.S. Geological Survey).

This image is made available as a Public Domain Work, but proper attribution is appreciated.

Keywords: lava flow | stratovolcano

Shasta