The Early Aptian is characterized by major changes in the global carbon and sulfur cycles. This project aims to better understand these changes and to explore the potential interdependencies of both perturbations. Previous experience with stable isotopes and/or Early Cretaceous carbon and/or sulfur cycling would be an asset. Excellent academic standing and good lab skill are a prerequisite. The anticipated start date of this fully funded position is the 1st of September 2009. For admission requirements see http://www.geology.utoronto.ca/students/graduate-students-1. Project inquiries can be directed to uli.wortmann@utoronto.ca