Anthony Feldman, Elisabeth Hausrath, Elizabeth Rampe, Thomas Sharp, Oliver Tschauner, Antonio Lanzirotti, and Mathew Newville, Nanoscale Analyses of X-ray Amorphous Material from Terrestrial Ultramafic Soils Record Signatures of Environmental Conditions Useful for Interpreting Past Martian Conditions, ACS Earth and Space Chemistry Article ASAP. DOI: 10.1021/acsearthspacechem.4c00158