Elizabeth B Rampe¹, Thomas Bristow², David Frederick Blake², David Vaniman³, Richard V Morris¹, Douglas W Ming¹, Shaunna M Morrison⁴, Albert Yen⁵, Cherie Achilles⁶, Robert Hazen⁴, Robert T Downs⁷, Allan H Treiman⁸, Steve Chipera⁹, Valerie Tu¹⁰, Patricia Craig¹¹, Nicholas Castle¹², Michael Thorpe¹³, Richard C Walroth², Gordon Downs¹⁴, Tanya Peretyazhko¹⁵, John P Grotzinger¹⁶, David Des Marais¹⁷ and Mark R Salvatore¹⁸, (1)NASA Johnson Space Center, Houston, TX, United States, (2)NASA Ames Research Center, Moffett Field, CA, United States, (3)Planetary Science Institute, Tuscon, CA, United States, (4)Carnegie Institution for Science, Geophysical Laboratory, Washington, DC, United States, (5)NASA Jet Propulsion Laboratory, Pasadena, CA, United States, (6)NASA Goddard Space Flight Center, Greenbelt, MD, United States, (7)University of Arizona, Department of Geosciences, Tucson, AZ, United States, (8)Lunar & Planetary Inst, Houston, TX, United States, (9)Chesapeake Energy, Oklahoma City, OK, United States, (10)Jacobs at NASA Johnson Space Center, Houston, United States, (11)Planetary Science Institute Tucson, Tucson, United States, (12)Lunar and Planetary Institute, Houston, TX, United States, (13)Stony Brook University, Stony Brook, NY, United States, (14)University of Arizona, Tucson, United States, (15)JACOBS, NASA Johnson Space Center, Houston, TX, United States, (16)Caltech, Pasadena, CA, United States, (17)NASA Ames, Mountain View, CA, United States, (18)Northern Arizona University, Flagstaff, AZ, United States