This course will focus on the application of chemical principles to studies in the Earth Sciences. It will be taught using specific case studies from selected themes, which will change on a yearly basis. Possible themes might include: global geochemical cycles, microbial geochemistry, origin and distribution of the elements and geochemical kinetics. The course will be team taught, in which individual instructors will focus on a particular aspect of each theme, providing some lectures for background prior to reading the important literature.