Each volcano has unique warning signs that eruption is imminent
Tracy K.P. Gregg, University at Buffalo, The State University of New York How do volcanologists know what a volcano is
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Volcanoes
More bad news for dinosaurs: Chicxulub meteorite impact triggered global volcanic eruptions on the ocean floor
Leif Karlstrom, University of Oregon and Joseph Byrnes, University of Minnesota The end of the Cretaceous period 66 million years
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