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Title: MOUNT ST. HELENS ERUPTS
Caption: (d) About an hour after eruption starts. (Roger Werth/Woodfin Camp and Associates)
Keywords: volcanoes, volcanism, volcanic eruptions, lavas, composite cones, stratovolcanoes, Cascade Range, Cascades, Mount St. Helens, pyroclastic flows, mass wasting, movements, pyroclastics, mudflows, lahars