Joshua M Feinberg, Department of Earth and Environmental Sciences, University of Minnesota, Minneapolis, MN, United States, Ioan Lascu, Smithsonian Institution, Washington DC, United States, Eduardo A. Lima, MIT-Earth & Planetary Sciences, Cambridge, MA, United States, Benjamin P Weiss, MIT, Earth, Atmospheric and Planetary Sciences, Cambridge, MA, United States, Jeffrey A Dorale, University of Iowa, Iowa City, IA, United States, E. Calvin Alexander Jr, University of Minnesota Twin Cities, Minneapolis, MN, United States and R. Lawrence Edwards, Nanjing Normal University, Dept. of Geography, Nanjing, China