THIRTIETH ANNIVERSARY OF THE 1980 ERUPTION OF MOUNT ST. HELENS MOUNT ST. HELENS 1980 ERUPTION QUIZ 1. What was the date and time of the 1980 Mount St. Helens eruption? 2. What was Mount St. Helens’ elevation before

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Date: 2010-04-27 17:37:05 Cascade Volcanoes Explosive eruption Types of volcanic eruptions Cascade Range Volcanic activity of Mount St. Helens David A. Johnston Geology Volcanology Mount St. Helens		THIRTIETH ANNIVERSARY OF THE 1980 ERUPTION OF MOUNT ST. HELENS MOUNT ST. HELENS 1980 ERUPTION QUIZ 1. What was the date and time of the 1980 Mount St. Helens eruption? 2. What was Mount St. Helens’ elevation before Add to Reading List Source URL: www.dnr.wa.gov Download Document from Source Website File Size: 1,34 MB Share Document on Facebook