Global Volcanism Program | Image GVP-06567
Four overlapping dacitic domes form the Black Buttes lava dome on the lower western flank of Mount Shasta. This view looks NW from the summit of Black Buttes at the rubbly tops of two domes with the outskirts of the town of Weed below. Pyroclastic flows accompanying formation of Black Buttes extend 10 km south and 5 km north, and underlie currently populated areas.
Photo by Lee Siebert, 1998 (Smithsonian Institution).