My research is in stratigraphic and paleoenvironmental synthesis, using the stable carbon & oxygen isotopic geochemistry of carbonates and fossil material, and the carbon isotopic composition of organic matter in the stratigraphic rock record. Recently, this work has been at the state-of-the-art Keck Paleoenvironmental & Environmental Stable Isotope Laboratory at the University of Kansas, using a Finnigan Kiel III automated carbonate reaction device, and a dual-inlet Finnigan MAT 253 stable isotope ratio mass spectrometer, and a Costech Elemental Analyzer coupled to a continuous-flow Finnigan MAT 253 mass spectrometer. Work has been focused on Cretaceous, Neogene, and Ordovician global change studies that have received external peer-reviewed grant support.