Bernard Hallet, University of Washington, Department of Civil and Environmental Engineering, Seattle, WA, United States, Ronald S Sletten, University of Washington, Quaternary Research Center, Earth and Space Sciences, Seattle, WA, United States, Nicolas Mangold, Universite Nantes, Nantes, France, Alberto G. Fairén, Centro de Astrobiología (CSIC-INTA), Madrid, Spain, and Dept. of Astronomy, Cornell University, Ithaca, United States and Robert J Sullivan Jr, Cornell University, CCAPS, Ithaca, NY, United States