Western Coastal and Marine Geology
Coastal and Marine Earthquake Studies
Cascadia Earthquakes & Tsunami Hazard Studies

Volcanoes and Earthquake Hazards of Washington State

volcanoes

image of Mt. Rainier

The Cacscade Range is made up of numerous volcanoes such as Mt. Rainier and Mt. St. Helens pictured below. The magma that occasionally erupts is derived from melting of rocks pushed beneath the Earth's crust by the subduction process.

erupt

Learn more about Crustal Structure.

 

       
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U.S. Department of the Interior | U.S. Geological Survey | Western Coastal & Marine Geology
URL: http://walrus.wr.usgs.gov/earthquakes/cascadia/volcanoes.html
maintained by Laura Zink Torresan
created 15 July 1998