Research directions
Research
My primary research interests concern major catastrophes in Earth's history in the broadest sense, including meteorite impacts and episodes of major volcanic eruptions, and their biotic effects. This research integrates paleontology, stratigraphy, sedimentology, clay mineralogy and geochemistry in reconstructing past environmental change associated with or leading up to mass extinctions. My research covers a wide variety of climatic and oceanographic problems from the Phanerozoic and concentrates on the global aspects of major environmental changes (e.g., Cretaceous-Tertiary boundary mass extinction, Paleocene-Eocene thermal maximum, global oceanic anoxic events, end-Devonian mass extinction). Other preferred topics include environmental geology, paleoclimatology, global change, phosphorus and carbon cycles, feedback loops, evolution of carbonate platforms, large-scale changes in carbonate facies, sequence stratigraphy, continental weathering systems, chemical weathering, soil formation, in Cretaceous, Tertiary and Quaternary deposits
