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Jeremy Kerr

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02132011What causes mass extinctionsCombines bolide impact with volcanism more bolideRepresents longer process than single mass extinctionVolcanism explains Permian extinction moreEntire region became volcanic and precipitated problemsBolide things hitting the earth liquefies earths crustSlide 22Volcanism blanketed the earth in darkness caused acidification and massive climate change CO2Source of acidification goes away but CO2 is left over raises temperatureSlide 23Uncertain if its more or less important than volcanism but is one of the things that made dinosaurs extinctSlide 24End of glacial periodClima
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