The long-timescale co-evolution of biogeochemical cycles, the chemical and isotopic composition of the oceans and atmosphere, and climate on Earth and other planets.
The geological, geochemical, and geobiological history of Earth, planets and satellites.
Global biogeochemical cycles and their interaction with the climate system.
Episodes of global climatic, biological or geochemical change, their causes and consequences, and their expression in the sedimentary rock record.
Fractionation of stable isotopes during metabolic activity, its governing factors, and its expression in modern environments and in the sedimentary rock record.