Products of each extrusive episode include talus that accumulated during that episode. Includes accumulated talus.
Scale varies owing to perspective view.
Approximate 1986 east-west basal diameter of dome was about 860 meters. West-East Geologic Section of gully bank near NE base of Mount St. Helens, south of Windy Ridge. Plot of thickness vs. distance from vent for several tephras from Cascade Range volcanoes.