Catherine M Weitz¹, John A Grant III², Nicholas H Warner³, Matthew P Golombek⁴, Ernst Hauber⁵, Veronique Ansan⁶, Sharon A. Wilson², Constantinos Charalambous⁷, Nathan R Williams⁴, Fred J Calef III⁸, William T Pike⁷, Heather Lethcoe-Wilson⁴, Justin Maki⁴, Alyssa DeMott³ and Megan Kopp³, (1)Planetary Science Institute Tucson, Tucson, AZ, United States, (2)Smithsonian National Air and Space Museum, Center for Earth and Planetary Studies, Washington, DC, United States, (3)SUNY at Geneseo, Department of Geological Sciences, Geneseo, NY, United States, (4)NASA Jet Propulsion Laboratory, Pasadena, CA, United States, (5)German Aerospace Centre (DLR), Berlin, Germany, (6)LPGN Laboratoire de Planétologie et Géodynamique de Nantes, Nantes Cedex 03, France, (7)Imperial College London, London, SW7, United Kingdom, (8)Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States