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04-30c 04_30c.JPG |
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| Title: | MOUNT ST. HELENS BEFORE AND AFTER |
| Caption: | (c) Mount St. Helens after the May 18, 1980, eruption. During the eruption, much of the northern side of the composite volcano was blown away and the altitude of the summit was reduced by approximately 400 m (1314 ft.). The lateral blast shown in Figure 4.31 originated in the amphitheater-like area in the top center of the photograph. (Washington State Tourism Development Division) |
| Keywords: | volcanoes, volcanism, volcanic eruptions, lavas, composite cones, stratovolcanoes, Cascade Range, Cascades, Mount St. Helens, pyroclastic flows, pyroclastics, mass wasting, movements, mudflows, lahars |