Field guides provide history and context for your next field trip to Mount St. Helens

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Exposures in valleys surrounding Mount St. Helens reveal records of diverse geologic processes including debris avalanche, lahar, huge water wave on a nearby lake, pyroclastic density currents (surge and flow), tephra fall, lava flow, growth of domes, and past glaciation. 

This new field guide provides detailed information for 28 self-guided field trip stops, many of which explore effects of the several catastrophes that constituted the May 18, 1980 eruption.

Our Mount St. Helens field guides are listed below.  Additional field-trip guides for selected volcanoes and volcanic landscapes of the western United States can be downloaded from the USGS Publications Warehouse.

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