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THE REGIONAL STRATIGRAPHIC CHART FOR THE ORDOVICIAN OF THE WEST SIBERIAN LOWLAND
N. V. Sennikov 1,2, O. T. Obut 1,2, N. G. Izokh 1, A. V. Timokhin 1, Yu. F. Filippov 1,2, T. P. Kipriyanova 1, E. V. Lykova 1, L. G. Peregoedov 3, N. P. Kulkov 3, L. S. Ratanov 3, S. N. Makarenko 4, S. A. Rodygin 4, N. I. Savina 4, G. M. Tatyanin 4, A. E. Koveshnikov 5, V. S. Bochkarev 6, A. S. Timchuk 7, K. S. Ivanov 8, R. R. Yakupov 9, T. Yu. Tolmacheva 10, L. M. Modzalevskaya 10
1 А.А.Тrofimuk Institute of Petroleum Geology and Geophysics SB RAS, Novosibirsk, Russia; 2 Novosibirsk State University, Novosibirsk, Russia; 3 Siberian Research Institute of Geology, Geophysics and Mineral Resources, Novosibirsk, Russia; 4 Tomsk State University, Tomsk, Russia; 5 Tomsk University of technology, Tomsk, Russia; 6 Siberian Scientific-Analytical Center, Tyumen, Russia; 7 West Siberia Institute of Geology and Geophysics, Tyumen, Russia; 8 A.N.Zavaritsky Institute of Geology and geochemistry, UrB RAS, Ekaterinburg, Russia; 9 Institute of Geology SC RAS, Ufa, Russia; 10 All-Russian Geological Institute, Saint-Petersburg, Russia
A new version of the Regional stratigraphic chart for the Ordovician of the West Siberian Lowland and the explanatory note, compiled in accordance with the Russian Stratigraphic Code, introduce changes, additional and specified data in comparison with the previous (first edition) chart. Since 1998, the stages of the Ordovician chart were changed completely. New stages – Tremadocian, Floian, Dapingian, Darriwilian, Sandbian, Katian and Hirnantian were adopted by Interdepartmental Stratigraphic Committee of Russia. The independent Regional Stratigraphic Scheme for the Devonian of the West Siberian Lowland and the Regional Stratigraphic Scheme for the Cambrian of the Pre-Yenisei Part of West Siberian Lowland were adopted. The proposed scheme for the Ordovician of West Siberian Lowland fills the lower part of the Ordovician-Silurian interval for the West Siberia. New paleontological, stratigraphical, lithological, seismo-stratigraphical data for the Ordovician of the West Siberian Lowland were obtained and generalized. For the first time independent Regional stratigraphic chart for the Ordovician of the West Siberian Lowland was compiled.
Keywords: West Siberian Lowland, Ordovician, regional stratigraphic chart, explanatory note.
DOI 10.20403/2078-0575-2023-3-3-39