Shastina forms the west flank of Mount Shasta with Whitney Glacier at its base. It is composed of overlapping lava flows and domes. Emplacement of the Shastina domes about 9,700-9,400 years ago was accompanied by pyroclastic flows and lava flows that traveled long distances down its flanks.

Photo by Bill Chadwick, 1981 (U.S. Geological Survey).

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

Keywords: lava dome | stratovolcano

Shasta