Topographic map, Mount St. Helens, C.E. 1919 annotated with locations
Detailed Description
Topographic map, Mount St. Helens, C.E. 1919 annotated with locations of volcanic deposits from ~275 to 12.8 ka. Due to the cataclysmic eruption of May 18, 1980, many of the locations annotated on this map are not either covered or not longer visible.
Sources/Usage
Public Domain.
Related
Eruption History of Mount St. Helens through start of Holocene
Volcanologists have recognized and named four stages of volcanic activity—Ape Canyon, Cougar, Swift Creek, and Spirit Lake—separated by dormant intervals.
Related
Eruption History of Mount St. Helens through start of Holocene
Volcanologists have recognized and named four stages of volcanic activity—Ape Canyon, Cougar, Swift Creek, and Spirit Lake—separated by dormant intervals.