What caused the mass extinction? A volcanic eruption.

摘要: The authors proposes that dust, carbon dioxide and other emissions from an episode of enormous volcanism formed the basaltic Deccan Traps in India produced climate changes led to mass extinction at end Cretaceous period. iridium could, he says, just as easily have risen earth's mantle. sheer size suggests their formation must been important event history. An important, unresolved question was whether data duration are compatible with age thickness KT boundary. Until recently lava samples were thought range 80 30 million years (estimated by measuring decay radioactive isotope potassium 40 rocks). author presents suggesting could not lasted much more than one roughly simultaneous