First Page | Document Content | |
---|---|---|
![]() Date: 2006-10-19 17:05:23Extinction events Planetary science Climate history Cretaceous Volcanoes K–T boundary Chicxulub crater Impact event Permian–Triassic extinction event Geologic time scale Phanerozoic Geology | Source URL: instruct.uwo.caDownload Document from Source WebsiteShare Document on Facebook |