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TITLE: Cascade Range

[Photo: Cascade Range]

Snow-clad volcanoes cap the Cascade Range. They sit above a subduction zone, where two oceanic plates are descending beneath the North American Plate, generating water-rich magmas that fuel explosive eruptions. Of the 26 active Cascade volcanoes, 14 have erupted during the last 2,000 years. The descending plates also create many small earthquakes. Large earthquakes are relatively rare because the young subducting plates are still hot.


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