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Permian-Triassic
   
   
   


http://hannover.park.org/Canada/Museum/extinction/permass.html   » The Permian Mass Extinction Open in a new browser window
   Discusses the geologic setting, possible causes, and taxa affected by the extinction event at the end of the Paleozoic.
   http://hannover.park.org/Canada/Museum/extinction/permass.html



   
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