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WikiProject Geology (Rated Start-class, Mid-importance)
WikiProject iconPaleoproterozoic is part of WikiProject Geology, an attempt at creating a standardized, informative, comprehensive and easy-to-use geology resource. If you would like to participate, you can choose to edit this article, or visit the project page for more information.
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Cyanobacteria were well established in the Archean, as a dozen other articles testify. Correct would be "Cyanobacteria continued to be one of the dominant life-forms in the biosphere", or some such. Macdonald-ross (talk) 07:12, 7 July 2011 (UTC)