Fe-oxide concretions formed by interacting carbonate and acidic waters on Earth and Mars Yoshida, H. ; Hasegawa, H. ; Katsuta, N. ; Maruyama, I. ; Sirono, S. ; Minami, M. ; Asahara, Y. ; Nishimoto, S. ; Yamaguchi, Y. ; Ichinnorov, N. ; Metcalfe, R. Abstract Publication: Science Advances Pub Date: December 2018 DOI: 10.1126/sciadv.aau0872 Bibcode: 2018SciA....4..872Y