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Proc Natl Acad Sci U S A
June 2006
Institut de Minéralogie et de Physique des Milieux Condensés, Unité Mixte de Recherche 7590, Centre National de la Recherche Scientifique, University of Paris 6 and 7, 140 Rue de Lourmel, 75015 Paris, France.
Microbialites are sedimentary deposits associated with microbial mat communities and are thought to be evidence of some of the oldest life on Earth. Despite extensive studies of such deposits, little is known about the role of microorganisms in their formation. In addition, unambiguous criteria proving their biogenicity have yet to be established.
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