Stratigraphic distribution of brachiopods in the Artinskian Stage of the western slope of the Middle Urals
Abstract
The distribution of brachiopods in the sediments of the Artinskian Stage of the Urals has been repeatedly considered in the literature by F. N. Chernyshev [1889, 1902], G. N. Fredericks [1918], B. V. Miloradovich [1949], and D. L. Stepanov [1939, 1951]. However, all researchers did not divide the Artinskian Stage into horizons based on brachiopods, although the abundance and diversity of Artinskian brachiopods have long suggested the possibility of using them to distinguish two substages and even local horizons of the Artinskian Stage [Stepanov, 1939, Miloradovich, 1949, 1951]. In addition, the so-called Sylva reefs occupy a controversial stratigraphic position, which M. V. Kulikov [1948], V. D. Nalivkin [1949], and D. L. Stepanov [1951] attributed to the uppermost part of the Artinskian Stage, adjacent to the Kungurian; B. V. Miloradovich [1949] determined their age as Kungurian.
None
References
- Kulikov M. V. On the age of the Sylvain reefs. DAN RAS, vol. XI, No. 1, 1948. (in Russian)
- Miloradovich B. V. On the vertical distribution of Upper Carboniferous and Lower Permian brachiopods of the Ufa Plateau area. Izv. AS USSR AN SSSR, ser. geol., No. 1, 1949. (in Russian)
- Miloradovich B. V., Ilyina I. S. Lithological and paleontological characterization of the Carboniferous and Permian deposits of the Urals. Gostoptekhizdat, 1951. (in Russian)
- Nalivkin V. D. Stratigraphy and Tectonics of the Ufa Plateau and the Yurezano-Sylvenskaya Depression. Proc Tr. VNIGRI, new ser., iss. 46, 1949. (in Russian)
- Stepanov D. L. On the Stratigraphic Significance of Upper Carboniferous and Lower Permian Brachiopods. RAN DAN SSSR, vol. XXV, No. 9, 1939. (in Russian)
- Stepanov D. L. Upper Paleozoic of the western slope of the Urals. Proc Tr. VNIGRI, new ser., iss. 54, 1951. (in Russian)
- Fredericks G. N. Note on the Artinskian Stage. Geol. vestnik Geologicheskii vestnik, vol. III, No. 1–6, 1918. (in Russian)
- Chernyshev F. N. General geologic map of Russia. Sheet 139, Proc Tr. Geolkoma, vol. III, No. 4, 1889. (in Russian)
- Chernyshev F. N. Upper Carboniferous brachiopods of the Urals and Timan. Proc Geol-com Tr. Geolkoma, vol. XVI, No. 2, 1902. (in Russian)