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Road guide to volcanic deposits of Mount St. Helens and vicinity, Washington
Michael P. Doukas
1990, Bulletin 1859
Mount St. Helens, the most recently active and most intensively studied Cascades volcano, is in southwestern Washington. The volcano is a superb outdoor laboratory for studying volcanic processes, deposits of observed events, and deposits whose origins are inferred by classic geologic techniques, including analogy to recent deposits. During the past...