Contributions of Volcanic Carbon Emissions to Environmental Change at the Cretaceous-Paleogene and Paleocene-Eocene Boundaries: Observational and Theoretical Constraints

James C Zachos, University of California Santa Cruz, Santa Cruz, United States, Donald E Penman, Yale University, New Haven, CT, United States and Andy Ridgwell, University of California, Riverside, Earth and Planetary Sciences, Riverside, United States; University of California, Department of Earth Sciences, Riverside, CA, United States