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dc.contributor.authorEl Daye, Mirna
dc.contributor.authorHiggins, John
dc.contributor.authorBosak, Tanja
dc.date.accessioned2020-08-25T17:46:04Z
dc.date.available2020-08-25T17:46:04Z
dc.date.issued2019-04
dc.identifier.issn0091-7613
dc.identifier.urihttps://hdl.handle.net/1721.1/126802
dc.description.abstractDolomite enabled the preservation of fine microbial textures in some Archean and Proterozoic marine microbialites, but has rarely done so during the Phanerozoic. Here, we report precipitation of dolomite in anoxygenic photosynthetic biofilms grown under chemical conditions relevant for Archean seawater. Ordered dolomite nucleates primarily on the surfaces of photosynthetic cells when manganese(II) is present, and nanocrystals of disordered dolomite form on exopolymeric substances in microbial cultures grown either in the dark or without manganese. Dolomite nucleation and maturation on different surfaces in photosynthetically active cultures amended with 0.1-1 mM manganese(II) enables the preservation of biofilm textures at scales larger than individual microbial cells. This provides a new model for the preservation of microbial textures by dolomite before the oxygenation of the oceanic photic zone.en_US
dc.description.sponsorshipNational Science Foundation (Award DMR-1419807)en_US
dc.language.isoen
dc.publisherGeological Society of Americaen_US
dc.relation.isversionofhttp://dx.doi.org/10.1130/g45821.1en_US
dc.rightsCreative Commons Attribution-Noncommercial-Share Alikeen_US
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/4.0/en_US
dc.sourceProf. Bosak via Chris Sherratten_US
dc.titleFormation of ordered dolomite in anaerobic photosynthetic biofilmsen_US
dc.typeArticleen_US
dc.identifier.citationDaye, Mirna et al. "Formation of ordered dolomite in anaerobic photosynthetic biofilms." Geology 47, 6 (April 2019): 509–512 © 2019 Geological Society of Americaen_US
dc.contributor.departmentMassachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciencesen_US
dc.relation.journalGeologyen_US
dc.eprint.versionAuthor's final manuscripten_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dc.date.updated2020-08-24T17:08:46Z
dspace.date.submission2020-08-24T17:08:47Z
mit.journal.volume47en_US
mit.journal.issue6en_US
mit.licenseOPEN_ACCESS_POLICY
mit.metadata.statusComplete


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