1. Department of Geosciences University of Nevada Las Vegas Las Vegas NV USA
2. Department of Geological Sciences University of Cape Town Rondebosch South Africa
3. Department of Earth and Atmospheric Sciences University of Alberta Edmonton AB USA
4. Scripps Institution of Oceanography University of California San Diego La Jolla CA USA
5. Department of Earth and Atmospheric Sciences University of Houston Houston TX USA
6. Lunar and Planetary Institute USRA Houston TX USA