Abstract
The study of acritarchs in Russia was initiated by Naumova and Timofeev in the early 50s. Their initial results showed the high potential of these microfossils for biostratigraphy and was followed by a remarkable degree of research activity in the 70s-80s. During a period of more than 50 years a great quantity of material was collected from different regions of Russia and especially from the two platforms: Siberian and East-European. However, in contrast to the East-European Platform material, which provided comprehensive data for the high resolution biostratigraphy for the all three Cambrian Series, data from the Siberian Platform did not furnish comparable results.
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