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Volcanic eruptions
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Volcanoes
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1. 2010 U.S. National Atlas Volcanoes
2010. U.S. National Atlas Volcanoes represents volcanoes thought to be active in the last 10,000 years (Holocene), in and near the United States. The dat... Environmental Systems Research Institute (Redlands, Calif.).
2. Volcanoes: United States, 2004
2004. National Atlas of the United States. This point shapefile includes Holocene volcanoes, which are those thought to be active in the last 10,000 years, that are within an extended area o... National Atlas of the United States.