 Other areas his research has focused on includes stable isotope applications for studying ancient diet and agriculture, the study of marker compounds in ancient soils, and the analysis of ancient tars, resins and embalming agents.His palaeontological research has applied a similar approach to fossils, to develop a better understanding of the processes involved in the diagenesis of fossil and sub fossil organisms.In biogeochemistry his research has focused on understanding the fate of soil organic matter.