Claire I O Nichols, Massachusetts Institute of Technology, Cambridge, MA, United States, Benjamin P Weiss, MIT, Earth, Atmospheric and Planetary Sciences, Cambridge, MA, United States, Adam C Maloof, Princeton University, Department of Geosciences, Princeton, NJ, United States, Athena Eyster, Harvard University, Cambridge, MA, United States, Tim Greenfield, Bullard Laboratories, Cambridge, United Kingdom, Jahandar Ramezani, MIT-EAPS, Cambridge, MA, United States, Michael J Zawaski, University of Colorado at Boulder, Boulder, United States, Nigel M Kelly, Colorado School of Mines, Golden, CO, United States, Stephen J Mojzsis, University of Colorado & Universite Lyon 1, Boulder, CO, United States, Bruce Watson, Rensselaer Polytechnic Institute, Troy, NY, United States and Daniele J Cherniak, Rensselaer Polytechnic Inst, Troy, NY, United States