Nadine Lynne Grambling, University of Tennessee, Knoxville, TN, United States, Leif Tokle, Brown University, Providence, RI, United States, Nicholas Dygert, University of Tennessee, Earth & Planetary Sciences, Knoxville, TN, United States, Greg Hirth, Brown Univeristy, Department of Earth, Environmental, and Planetary Sciences, Providence, RI, United States and Yan Liang, Brown University, Department of Earth, Environmental and Planetary Sciences, Providence, RI, United States