Paleogene of the southwestern Volgograd region (Borehole 13, Gremyach’e Area). 1. Biostratigraphy

The stratigraphy of Paleocene-Eocene rocks based on assemblages of dinocysts, benthic and planktonic foraminifers, nannoplankton, diatoms, and nummulites was refined in the sedimentary sequence penetrated by borehole (BH) 13 in the Gremyach’e potassium salt deposit. The rocks were subdivided into lo...

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Veröffentlicht in:Stratigraphy and geological correlation 2011-06, Vol.19 (3), p.310-336
Hauptverfasser: Aleksandrova, G. N., Beniamovski, V. N., Zaporozhets, N. I., Zastrozhnov, A. S., Zastrozhnov, S. I., Tabachnikova, I. P., Oreshkina, T. V., Zakrevskaya, E. Yu
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Sprache:eng
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Zusammenfassung:The stratigraphy of Paleocene-Eocene rocks based on assemblages of dinocysts, benthic and planktonic foraminifers, nannoplankton, diatoms, and nummulites was refined in the sedimentary sequence penetrated by borehole (BH) 13 in the Gremyach’e potassium salt deposit. The rocks were subdivided into local lithostratigraphic units with refined ages and more substantiated reference to the general and regional scales. In addition to formations of the Volga-Caspian region: Saratov, Kamyshin, Tsaritsyn, Mechetka and Elshanka, for the Paleogene of the southwestern Volgograd region there were used formations of neighbor regions as well: Eisk Formation (Paleocene) in the eastern Donetsk Basin and the Sergeevka, Tishki and Kas’yanovka formations (Middle and Upper Eocene) in the Voronezh Anteclise. The presence of the Oligocene in the section of the Maikop Group has been established for the first time. New biostratigraphic units based on dinocysts and foraminifers were suggested.
ISSN:0869-5938
1555-6263
DOI:10.1134/S0869593811030014