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| This pre-1980 view of Mount St. Helens shows the volcano's east flank and the headwaters of the Muddy River before the 18 May 1980 eruption. Shoestring Glacier descends the east flank. The broad forested area in the foreground is underlain by many layers of volcanic deposits, chiefly lahars and pyroclastic flows generated from past eruptions of Mount St. Helens. |
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URL of this document:
http://volcanoes.usgs.gov/Hazards/Effects/MuddyPre_caption.html<
Last modified: October 19, 1998
