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The marks on the following map (from the U.S. Geological Survey Web site) show the locations of volcanoes. What is the best explanation for the fact that many of the volcanoes seem to be clustered along certain lines?

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The marks on the following map (from the U.S. Geological Survey Web site) show the locations of volcanoes. What is the best explanation for the fact that many of the volcanoes seem to be clustered along certain lines?<br><img src='https://www.fatskills.com/images3/itbslevel13grade7/Map of airport closures and volcanoes responsible for ash/aircraft encounters, 1973-2000 .'/>






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