The timing and nature of changes in the chemistry of the early oceans are intensely debated. Geochemical analyses show that a prominent transition to sulphidic marine conditions 1.8 billion years ago may have been restricted to near-shore environments.
机构:
Georgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA
NASA Astrobiol Inst, Alternat Earths Team, Mountain View, CA 94035 USA
NASA Nexus Exoplanet Syst Sci NExSS, Buffalo, NY 14209 USAGeorgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA
Reinhard, Christopher T.
Planavsky, Noah J.
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机构:
NASA Astrobiol Inst, Alternat Earths Team, Mountain View, CA 94035 USA
Yale Univ, Dept Geol & Geophys, New Haven, CT USAGeorgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA