One of the Riphean reference sections in Russia is located on the Olenek Uplift in the north of the Siberian Platform. This section is rich in stromatolites and is characterized by abundance of glauconite in almost all terrigenous deposits from bottom to top. This permitted development of the most complete scale of K-Ar isotope dates continuous from Lower Riphean to Upper Riphean. The stratigraphy of the Lower Riphean section of the Olenek Uplift was comprehensively investigated in the 1980s, and one of the richest Lower Riphean algal microbiotas was collected in the uppermost beds of the section (silicified stromatolites in the upper Kyutingde Formation). It occurs above the beds dated at 1330 Ma BP, in a 60 km long stretch of carbonate rocks of the Kyutingde Formation. Microfossils were found at six localities in the basins of the Kyutingde and Sololi Rivers. Being dominated by coccoid species, the microbiota contains several morphologically specific eucaryotic forms. A total of 41 species of 23 genera were identified in the collection.

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First page of LOWER RIPHEAN ALGAL MICROBIOTA OF THE KYUTINGDE FORMATION OF THE OLENEK UPLIFT
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