Paleoecology and Geochemistry of the Upper Kellwasser Black Shale and Extinction Event - eScholarship

The deposition of the Upper Kellwasser black shale at the Frasnian-Famennian stage boundary in the Late Devonian coincided with one of the most enigmatic diversity crises and ecological perturbations in the Phanerozoic. Because of the ubiquity of organic-rich sediments deposited in Devonian epeiric seaways, it is commonly assumed that anoxia was the main driver of biological turnover at this time. Little is understood, however, about the actual...