Global Volcanism Program | Image GVP-03202
Shastina lava dome on the west flank of Mount Shasta, with Whitney Glacier at its base, is one of the most prominent Holocene features of Mount Shasta. Its summit contains several overlapping plug domes. Emplacement of Shastina about 9500 yerars 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).