Leah Salditch, Northwestern University, Earth and Planetary Sciences, Evanston, IL, United States, Seth Stein, Northwestern Univ, Department of Earth & Planetary Sciences, Evanston, IL, United States, James Neely, Northwestern University, Evanston, United States, Bruce D. Spencer, Northwestern University, Department of Statistics and Institute for Policy Research, Evanston, IL, United States, Edward Max Brooks, Northwestern University, Department of Earth and Planetary Sciences, Evanston, IL, United States and Mian Liu, University of Missouri, Geological Sciences, Columbia, MO, United States