I am a low-temperature geochemist interested in the role of water-rock reactions in global biogeochemical cycles. My research relies on observations of contemporary watersheds and the sedimentary record to build a comprehensive understanding of abiotic and biotic controls of nutrient cycling. My research group employs measurements of stable isotopes (e.g., lithium) and other trace metals (e.g., rhenium) to understand the chemical breakdown of minerals and organic matter, and often our work culminates in process-based numerical models to extract process from our geochemical proxies. Some ongoing projects include clay mineral formation and global alkalinity budgets, organo-mineral interactions, the oxidation of rock-bound organic matter, paleo-ecosystem responses to environmental change, and the comminution of sediment in watersheds.