Biosignatures link microorganisms to iron mineralization in a paleoaquifer Weber, K. A. ; Spanbauer, T. L. ; Wacey, D. ; Kilburn, M. R. ; Loope, D. B. ; Kettler, R. M. Abstract Publication: Geology Pub Date: August 2012 DOI: 10.1130/G33062.1 Bibcode: 2012Geo....40..747W