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Unformatted text preview: Hazards related to impacts 17) What is a mass extinction? PT extinction (Permian-Triassic extinction), percentage of species that disappeared Causes of mass extinctions Evidence for impacts Flood basalts...
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This note was uploaded on 06/28/2009 for the course GEL 17 taught by Professor Osleger,d during the Spring '08 term at UC Davis.
- Spring '08