ZONAL DIVISION AND CORRELATION OF MIDDLE AND UPPER ORDOVICIAN DEPOSITS OF THE TUNGUSKA SYNECLISE BASED ON BRACHIOPOD DATA

O. A. Maslova, A. G. Yadrenkina

Siberian Research Institute of Geology, Geophysics and Mineral Resources, Novosibirsk, Russia

The authors have adjusted and updated the description of biostratigraphic zones, relying on inventory data, distribution analysis, and additional study of brachiopods from the Middle and Upper Ordovician of the Tunguska syneclise. The deep well core data are of special importance, as they enabled significant adjustment and specification of the division and correlation of the Middle and Upper Ordovician deposits within the closed areas of the region under study.

Keywords: biostratigraphy, Ordovician, biostratigraphic zones, brachiopods, Siberian Platform.

DOI 10.20403/2078-0575-2017-3-3-17

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