  Volcanoes and the Theory of Plate Tectonics Recent Eruptions From U.S. Volcanoes Hawaiian volcanoes Active Volcanoes: Windows Into the Past by Steven R. Brantley For sale by the US. Government Printing Office Mount Shasta, California, has erupted at least 10 times in the past 3,400 years and at least 3 times in the past 750 years. (Photograph by Lyn Topinka.) |
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