Yuem Park, University of California Berkeley, Berkeley, CA, United States, Pierre Maffre, University Of California, Berkeley, Berkeley, United States, Nicholas Swanson-Hysell, University of California Berkeley, Earth and Planetary Science, Berkeley, CA, United States, Francis Macdonald, University of California, Santa Barbara, Santa Barbara, United States, Yves Godderis, CNRS, GET, Paris Cedex 16, France and Eliel Anttila, University of California, Santa Barbara, Santa Barbara, CA, United States