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 Date: 2012-11-14 19:43:51Mount St. Helens Types of volcanic eruptions Rain Earthquake Geology Volcanology Plate tectonics |
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Date: 2012-11-14 19:43:51Mount St. Helens Types of volcanic eruptions Rain Earthquake Geology Volcanology Plate tectonics |
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Downloaded from gsabulletin.gsapubs.org on November 14, 2012 Geological Society of America Bulletin Explosive tephra emissions at Mount St. Helens, : The violent escape of magmatic gas following storms? LARRY G