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Date: 2013-11-06 17:00:41Stratovolcanoes Cascade Volcanoes Cascade Range Plate tectonics Types of volcanic eruptions Volcano Mount St. Helens Explosive eruption Mount Jefferson Geology Volcanology Volcanism | Volcano Hazards in the Mount Jefferson Region, OregonAdd to Reading ListSource URL: pubs.usgs.govDownload Document from Source WebsiteFile Size: 503,67 KBShare Document on Facebook |