High concentrations of manganese and sulfur in deposits on Murray Ridge, Endeavour Crater, Mars - Arvidson, Raymond; Squyres, Steven; Morris, Richard V.; Knoll, Andrew; Gellert, Ralf; Clark, Benton C.; Catalano, Jeffrey; Jolliff, Bradley; McLennan, Scott; Herkenhoff, Kenneth; VanBommel, Scott; Mittelfehldt, David; et al. (American Mineralogist, 2016)