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Title: DEBRIS AVALANCHE AND ASH CLOUD
Caption: (a) Mount St. Helens's debris-avalanche deposits, zones of trees blown down or scorched, mudflows, and pyroclastic flow deposits associated with the May 18, 1980, eruption. (Data from various U.S. Geological Survey publications)
Keywords: volcanoes, volcanism, volcanic eruptions, lavas, composite cones, stratovolcanoes, Cascade Range, Cascades, Mount St. Helens, pyroclastic flows, mass wasting, movements, pyroclastics, mudflows, lahars