Wenshan Wang, University of California Irvine, Irvine, CA, United States, Charles S Zender, Univ California Irvine, Irvine, CA, United States, Dirk van As, Geological Survey of Denmark and Greenland, København K, Denmark, Robert S Fausto, Geus, Copenhagen, Denmark and Matthew K Laffin, University of California Irvine, Earth System Science, Irvine, CA, United States