Elemental geochemistry of sedimentary rocks at Yellowknife Bay, Gale crater, Mars. - McLennan SM; Anderson RB; Bell JF 3rd; Bridges JC; Calef F 3rd; Campbell JL; Clark BC; Clegg S; Conrad P; Cousin A; Des Marais DJ; Dromart G; et al. (Science (New York, N.Y.), 2014)