PICO, Tamara1, LAMB, Michael P.2, DAVID, Scott3, LARSEN, Isaac3, MIX, Alan4 and LEHNIGK, Karin E.5, (1)CaltechGeological & Planetary Sciences, 20 Oxford St, Cambridge, MA 02138-2902, (2)Geological and Planetary Sciences, California Institute of Technology, 1200 E. California Blvd, Pasadena, CA 91125, (3)Department of Geosciences, University of Massachusetts Amherst, Amherst, MA 01003, (4)College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, 104 CEOAS Admin Bldg, Corvallis, OR 97331, (5)Geoscience, UMass Amherst, 611 North Pleasant Street, 233 Morrill Science Center, Amherst, MA 01003