Tobias Keller¹, John M. Hanchar², Fernando Tornos³, Jenny Suckale¹, Dorota K. Pietruszka⁴, Nathan A. Graham⁵ and Kenneth P. Severin⁵, (1)Stanford University, Stanford, CA, United States, (2)Memorial Univ Newfoundland, St John''S, Canada, (3)CSIC-INTA, Astrobiologia, Madrid, Spain, (4)Memorial University of Newfoundland, St John's, Canada, (5)University of Alaska Fairbanks, Fairbanks, United States