File 17678 is a 627kB PowerPoint Uploaded:
Jul20 09 https://serc.carleton.edu/download/files/17678/mass_extinction_calibrated_pee.ppt
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Participant List https://serc.carleton.edu/NAGTWorkshops/paleo/workshop09/participants.html
Provenance Elizabeth Heise, University of Texas at Brownsville
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