#  A Euxinic Ocean, Globally, Across the Permian Triassic Boundary: Hydrogen sulfide as the Agent of the Great Mass Extinction 

 



####  calendar\_today Date and Time 

 **October 18, 2006** 

 04:00PM - 04:00PM EDT 

####  pin\_drop Location 

 **Agassiz Room ­ Harvard Museum of Natural History 26 Oxford Street**  



 

 



 

**Roger Summons (MIT)**



 

 



 

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