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Title: MOUNT ST. HELENS ERUPTS
Caption: (b) Eruption starts May 18, 1980. (Photograph ©1980 by Keith Ronnholm, the Geophysics Program, University of Washington, Seattle)
Keywords: volcanoes, volcanism, volcanic eruptions, lavas, composite cones, stratovolcanoes, Cascade Range, Cascades, Mount St. Helens, pyroclastic flows, mass wasting, movements, pyroclastics, mudflows, lahars