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Cascade Volcanoes / Mount St. Helens / Igneous rocks / Lava dome / Crater Glacier / Types of volcanic eruptions / Volcano / Volcanic activity of Mount St. Helens / Eruption of Mount St. Helens / Geology / Volcanology / Plate tectonics


USGS Scientific Investigations Map 2928
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Document Date: 2006-08-08 20:02:09

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File Size: 1,61 MB

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