Topics covered: Geochemical record of terrestrial environmental change, and global geochemical cycles; Chemical weathering and climate, river catchment studies; Environmental geochemistry of the terrestrial environment and its effect on health; Organic geochemistry; Marine and sedimentary geochemistry; Mineralogy, microbes and chemistry of weathering; Geochemical thermodynamics and kinetics; Geochemistry of crustal fluids and of catastrophic events.