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drelog drelog
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8 years ago
Mount St. Helens and the other Cascade volcanoes are ________.
A) old, deeply eroded stratovolcanoes built before the Pacific Ocean existed
B) old, deeply eroded, basaltic shield volcanoes built when western North America was over the present-day site of the Hawaiian hot spot
C) young, active stratovolcanoes built on a continental margin above a sinking slab of oceanic lithosphere
D) a row of young, active, shield volcanoes built as western North America moved over a hot spot deep in the mantle
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Earth Science

Earth Science


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drelog Author
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8 years ago
Everything checks out, respect
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