Samantha Elizabeth Hansen, University of Alabama, Tuscaloosa, AL, United States, Andrew Nyblade, Pennsylvania State University Main Campus, Department of Geosciences, University Park, PA, United States, Douglas A Wiens, Washington University in St Louis, Department of Earth and Planetary Sciences, St. Louis, MO, United States, Richard C Aster, Colorado State University, Geosciences Department, Fort Collins, CO, United States and Sridhar Anandakrishnan, Pennsylvania State University Main Campus, Geosciences, University Park, PA, United States