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Topographic map, Mount St. Helens, C.E. 1919 annotated with locations

By Volcano Hazards Program
Topographic map, Mount St. Helens, C.E. 1919 annotated with locations of volcanic deposits from ~275 to 12.8 ka.
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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.