Research Interests

  • Research on shale gas funded by the Department of Energy.
  • Stable isotopes in fossil fuels (oil, coal, gas) reveal how original biological material, heat and time affected the chemical composition of sedimentary organic matter.
  • Paleoclimatology of laminated sediments from the Santa Barbara Basin off California and in Vietnamese maars.
  • Radon isotopes in soil-built dwellings in developing countries.
  • Subterranean methanotrophic consumption of atmospheric methane.
  • Development of organic hydrogen, carbon, and nitrogen stable isotope reference materials.