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![]() Date: 2007-01-20 13:59:26Extinction events Planetary science Climate history Impact events Permian Permian–Triassic extinction event Methane clathrate Anoxic event Cretaceous–Tertiary extinction event Geologic time scale Phanerozoic Historical geology | Source URL: www.le.ac.ukDownload Document from Source WebsiteFile Size: 732,50 KBShare Document on Facebook |