Cyanobacteria

Architects of the earliest microfossils, atmospheric oxygen, and plastids.

Proterozoic stromatolitic microbiotas of the 1400-1500 Ma-old Gaoyuzhuang formation near Jixian, northern China.

Entrez PubMed: "Two communities of diverse, well-preserved, fossil prokaryotic microorganisms have been discovered in petrographic thin sections of carbonaceous black chert from the ca. 1400-1500 Ma-old Gaoyuzhuang Formation at the stratotype section of the 'Sinian Suberathem' near Jixian, northern China. One of these communities is preserved in bedded, essentially flat-laminated, stromatolitic chert; the other occurs in silicified conical stromatolites of the forms Conophyton cylindricum and C. garganicum. The Gaoyuzhuang cherts comprise one of the new microfossiliferous deposits now known from the Precambrian of China; the permineralized microbiotas they contain are among the first such stromatolitic assemblages to be discovered in the Sinian stratotype section."

Proterozoic stromatolitic microbiotas of the 1400-1500 Ma-old Gaoyuzhuang formation near Jixian, northern China. Schopf JW, Wei-Qing Z, Zhao-Liang X, Jen H. Precambrian Res. 1984;24:335-49.

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