Pragian conodont biostratigraphy of the western slope of the Southern Urals (Mindigulovo section)
https://doi.org/10.24930/1681-9004-2023-23-6-950-969
Abstract
Research subject. Pragian conodonts from the Mindigulovo section on the western slope of the South Urals. Aim. Conodont-based biostratigraphy of the Pragian deposits. Materials and methods. This study is based on the biostratigraphic method: identification of conodonts using conventional techniques, recognition of Pragian conodont associations, zonal scale proposal and correlation. Results. The Pragian beds in the Mindigulovo Section in the latitudinal flow of the Belaya River are characterized using conodonts for the first time. The following conodont-based subdivisions at the rank of beds with fauna are recognized (from bottom to top): Beds with Gondwania irregularis, Latericriodus steinachensis, Beds with Pelekysgnathus serratus, Beds with Gondwania profunda, Pseudogondwania kindlei and Beds with Polygnathus cf. pireneae. Conclusions. The recognized conodont-based units can be directly correlated with the standard zonal scale of the Pragian. The conodont assemblage studied contains taxa characterizing the Gondwania irregularis–Gondwania profunda, Pseudogondwania kindlei–Eognathodus zeravshanicus, Polygnathus pireneae lineage, also known in the Pragian successions of Australia and the South Tien Shan. The co-occurrence of the deep-water family Eognathodidae and the shallow-water Icriodontidae in the Mindigulovo Section enables the correlation of different facies sections.
Keywords
Southern Urals,
Lower Devonian,
Pragian stage,
Kulamat Horizon (Regional Substage),
correlation,
conodonts
Supporting agencies: The work was carried out within the framework of the state assignment “The main events of the Phanerozoic: paleontology, stratigraphy, correlation”, No. NIOKTR FMRS-2022-0010
About the Authors
T. M. Mavrinskaya
Institute of Geology, UFRC RAS
Russian Federation
Russian Federation
16/2 K. Marx st., Ufa 450077
A. R. Sharipova
Institute of Geology, UFRC RAS
Russian Federation
Russian Federation
16/2 K. Marx st., Ufa 450077
References
1. Bardashev I.A., Weddige K., Ziegler W. (2002) Phylomorphogenesis of some Early Devonian platform conodonts. Senckenbergiana Lethaea, 82(2), 375-451.
2. Becker R.T., Gradstein F.M., Hammer O. (2012) Devonian Period. (Eds F.M. Gradstein, J.G. Ogg, M.D. Schmitz, G.M. Ogg). Geologic Time Scale, 1(20). Amsterdam: Elsevier, 559-601. https://doi.org/10.1016/B978-0-444-59425-9.00022-6
3. Becker R.T., Königshof P., Brett C.E. (2016) Devonian climate, sea level and evolutionary events: an introduction. Geolog. Soc., Spec. Publ., 423. URL: http://sp.lyellcollection.org
4. Becker R.T., Marshall J.E.A., Da Silva A.C., Agterberg F.P., Gradstein F.M., Ogg J.G. (2020) Geologic Periods: Phanerozoic. Ch. 22. The Devonian Period. (Еds F.M. Gradstein, J.G. Ogg, M.D. Schmitz, G.M. Ogg). The Geologic Time Scale, 2. Amsterdam: Elsevier, 733-810. https://doi.org/10.1016/B978-0-12-824360-2.00022-X
5. Chlupáč I., Lukes P. (1999) Pragian/Zlichovian and Zlichovian/Dalejan boundary sections in the Lover Devonian of the Barrandian area, Czech Republic. Newslett. Stratigr., 37(1/2), 75-100.
6. Chlupáč I., Kukal Z. (1986) Reflection of possible global Devonian events in the Barrandian area, C.S.S.R. (Еd. Walliser O.H.). Global Bio-events. Lecture Notes in Earth Sciences, 8, 169-179.
7. Chlupáč I., Kukal Z. (1988) Possible global events and the stratigraphy of the Paleozoic of the Barrandian (Cambrian–Middle Devonian, Czechoslovakia). Sborník geologických věd, Geologie, 43, 83-146.
8. Chlupáč I., Oliver W.A. (1989) Decision on the Lochkovian-Pragian boundary stratotype (Lower Devonian). Episodes, 12, 109-113.
9. Guidelines and statutes of the International Commission on Stratigraphy (ICS). (1986) (J.W. Cowie, W.H. Ziegler, A. Boucot, M.G. Bassett, J. Remane). Courier Forschungs institut Senckenberg, 83, 1-14.
10. Hladil J., Slavík L., Schnabl P., Koptíková L., Frána J., Vacek F., Bábek O. (2008) The gross environmental phenomenon of the classical Pragian stage (“hot lowstand”). (Еd. A. Bjorlykke). X–CD Technologies, 33 rd International Geological Congress, International Union of Geological Sciences. Abstract CD-ROM, HPF-01 Gene ral contributions to paleontology and historical geology, pt 1, 1343454.
11. Klapper G. (1977) Lower and Middle Devonian conodont sequence in central Nevada, with contributions by D.B. Johnson. Western North America: Devonian. (Eds M.A. Murphy, W.B.N. Berry, C.A. Sandberg). University California, Riverside Campus Museum, Contribution, 4, 33-54.
12. Koptíková L., Hladil J., Slavík L., Bábek O., Čejchan P. (2010) Fine-grained non-carbonate particulates embedded in neritic to pelagic limestones (Lochkovian to Emsian, Prague Synform, Czech Republic): Composition, provenance and links to magnetic susceptibility and gamma-ray logs. Geol. Belgica, 13(4), 407-430.
13. Lane H.R., Ormiston A.R. (1979) Siluro–Devonian biostratigraphy of the Salmontrout Rive area, east–central Alaska. Geologica et Palaeontologica, 13, 39-96.
14. Legend of the South Ural series of sheets of the State Geological Map of the Russian Federation scale 1 : 200 000 (second ed.). (1999) St.Petersburg, VSEGEI. (In Russ.)
15. Lu J.-F., Qie W.-Q., Chen X.-Q. (2016) Pragian and lower Emsian (Lower Devonian) conodonts from Liujing, Guangxi, South China. Alcheringa, 40, 275-296. ISSN 0311-5518.
16. Lu J.-F., Valenzuela-Ríos J.I., Liao J.-C., Wang Yi. (2019) Polygnathids (Conodonta) around the Pragian/Emsian boundary from the Dacun-1 section (central Guangxi, South China). J. Paleontol., 93(6), 1210-1220. https://doi.org/10.1017/jpa.2019.31
17. Mavrinskaya T.М., Artyushkova O.V. (2017) Conodont characteristic of the Lochkovian–Pragian boundary interval in the Mindigulovo section (western slope of the Southern Urals). Palaeobiodivers. Palaeoenviron., 97(3), 391-404. https://doi.org/10.1007/s12549-017-0292-1
18. Mavrinskaya T.M., Artyushkova O.V. (2020) Lochkovian deposits of the western slope of the Southern Urals, their subdivision and global correlation based on conodont fauna. Izv. Tomsk. Politekhn. Un-ta. Inzhiniring Georesursov, 331(3), 213-225. (In Russ.)
19. Mavrinskaya T.M., Slavik L. (2013) Correlation of Early Devonian (Lochkovian–early Pragian) conodont faunas of the South Urals (Russia). Bull. Geosci., 88(2), 283-296.
20. Mawson R. (1998) Thoughts on Late Pragian–Emsian polygnathid evolution: documentation and discussion. (Ed. H. Szaniawski). Proceedings of the Sixth European Conodont Symposium (ECOS VI). Palaeontol. Polonica, 58, 201-211.
21. Murphy M.A. (2005) Pragian conodont zonal classification in Nevada, western North America. Revista Española de Paleontología, 20, 177-206.
22. Philip G.M. (1965) Lower Devonian conodonts from the Tyers area, Gippsland, Victoria. Proceedings of the Royal Society of Victoria, 79, 95-121.
23. Slavík L. (2004) The Pragian–Emsian conodont successions of the Barrandian area: Search of an alternative to the GSSP Polygnathid–based correlation concept. Geobios, 37, 454-470.
24. Slavík L., Hladil J. (2004) Lochkovian Pragian GSSP revisited: Evidence about conodont taxa and their stratigraphic distribution. Newslett. Stratigr., 40(3), 137-153.
25. Slavík L., Valenzuela-Ríos J.I., Hladil J., Carls P. (2007) Early Pragian conodont–based correlations between the Barrandian area and the Spanish central Pyrenees. Geol. J., 42, 499-512.
26. Stratigraphic charts of the Urals (pre-Cambrian, Paleozoic). (1993) (Eds N.Y. Antsygin, B.A. Popov, B.I. Chuvashov). Ekaterinburg. (In Russ.)
27. Talent J.A., Mawson R., Andrew A.S., Hamilton P.J., Whitford D.J. (1993) Middle Palaeozoic extinction events: faunal and isotope data. Palaeogeogr., Palaeoclimatol., Palaeoecol., 104, 139-152.
28. Tyazheva A.P., Zhavoronkova R.A., Garifullina A.A. (1976) The Lower Devonian corals and brachiopods in the South Urals. Moscow, Nauka Publ., 223 p. (In Russ.)
29. Yolkin E.A., Izokh N.G., Weddige K., Erina M.V., Valenzuela-Ríos J.I., Apekina L.S. (2011) Eognathodid and polygnathid lineages from the Kitab state geological reserve sections (Zeravshan-Gissar moutainous area, Uzbekistan) as the bases for improvements of Pragian–Emsian standard conodont zonation. News of paleontology and stratigraphy, Supplement to the journal “Geology and Geophysics”, 52(15), 37-45. (In Russ.)
30. Walliser O.H. (1996) Global Events in the Devonian and Carboniferous. (Ed. O.H. Walliser). Global Events and Event Stratigraphy in the Phanerozoic, 225-250.
31. Weddige K. (1987) The lower Pragian boundary (Lower Devonian) based on the conodont species Eognathodus sulcatus. Senckenbergiana Lethaea, 67(5/6), 479-487.
32. Ziegler W., Lane H.R. (1987) Cycles in conodont evolution from Devonian to mid–Carboniferous. (Ed. R.J. Aldridge). Palaeobiology of conodonts, 147-164.
33. Ziegler W., Weddige K. (1999) Zur Biologie, Taxonomie und Chronologie der Conodonten. Paläontologische Zeitschrift, 73, 1-38.
Review
For citations:
Mavrinskaya T.M., Sharipova A.R. Pragian conodont biostratigraphy of the western slope of the Southern Urals (Mindigulovo section). LITHOSPHERE (Russia). 2023;23(6):950-969. (In Russ.) https://doi.org/10.24930/1681-9004-2023-23-6-950-969
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