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Title: LOCATIONS OF VOLCANOES IN THE UNITED STATES
Caption: A. Alaska. (From Wright, T. L., and Pierson, T. C. 1992. U.S. Geological Survey Circular 1073)
Keywords: volcanoes, volcanism, volcanic eruptions, plate tectonics, tectonic plates, convergent boundary, convergent boundaries, subduction zones, oceanic crust, continental crust, trenches, volcanic island arcs, composite cones, stratovolcanoes