Biostratigraphy of the middle jurassic of central and eastern platform Ukraine

Authors

  • О. А. Шевчук Institute of Geological Sciences, NAS of Ukraine, Ukraine

DOI:

https://doi.org/10.26565/2410-7360-2016-45-12

Keywords:

Bajocian, Bathonian, Callovian, spore-pollen complex, dinocysts, acritarchs, cuticles, tracheids, microforaminifers, Ukrainian Shield, Dnieper-Donets Basin, Donbass

Abstract

The new paleontological data are supplemented by a stratigraphic scheme of the Middle Jurassic in the eastern slope of the Ukrainian shield, the Dnieper-Donets Basin and the north-western part of Donbass. Middle Jurassic sediments stratification of a platform Ukraine was conducted through various groups of fauna and flora. Namely, in the article the full spore-pollen complexes and complexes dinocysts are considered. Other groups, such as the remains of fungi, cuticles, tracheids, acritarchs, microforaminifers, remains of insects, etc., are also characterized by deposits microfossils. In this study, sediment samples from boreholes (wells) and outcrops cutting through Mid-Jurassic, Bajocian, Bathonian, Callovian successions of central Ukraine (the eastern slope of the Ukrainian shield) in the western region of Dnieper-Donets Basin and the north-western part of the Donbass, were analysed palynologically. Over 20 genera of dinocysts have been identified and they represent a wide range of forms; planktonic marine, planktonic coastal, benthic coastal, and freshwater specimens. The taxonomic identification of the dinoflagellate cysts and their vertical distribution enables to recognize six dinoflagellate assemblages from Middle Jurassic: Assemblage I (upper Bajocian – presence of the dinocysts Pareodinia sp., Pareodinia evitti, Gonyaulacysta helicoids); Assemblage II (uppermost Bajocian – Zona Acanthaulax crispa); Assemblage IІІ (lower, middle Bathonian. – Zona Ctenidodinium combazii–Ctenidodinium sellwoodii); Assemblage ІV (middle, upper Bathonian and lowermost Callovian – layers with the dinocysts Pareodinia spp., Ctenidodinium spp.); Assemblage V (the uppermost lower- and middle Callovian – Zona Ctenidodinium ornatum–Ctenidodinium continuum); Assemblage VI (upper Callovian – strata with the dinocysts Ctenidodinium ornatum, Batiacasphaera sp., Chlamydophorella sp., Cleistosphaeridium sp., Epiplosphaera sp., Atopodinium sp., Occisucysta sp, Leptodinium sp., Cribroperidinium granulatum, Dapcodinium sp., Nannoceratopsis sp., Acanthaulax senta, Cyclonephelium sp., Dapcodinium sp., Pareodinia sp., Aldorfia sp.). As a result of a palynological analysis we have established seven spore-pollen complexes for middle Jurassic sediments found in wells and outcrops within the central and eastern parts of Ukraine platform.

Author Biography

О. А. Шевчук, Institute of Geological Sciences, NAS of Ukraine

PhD (Geology), Senior Researcher

References

Decisions of the All-Union meeting on the development of a unified scheme of stratigraphy of the Mesozoic deposits of the Russian platform (1955). Moscow, Gostoptekhizdat, 36.

Decisions of the All-Union meeting on the development of a unified scheme of stratigraphy of the Mesozoic deposits of the Russian platform (1962). Moscow, Gostoptekhizdat, 38.

Semenovа, E.V. (1970). The spores and pollen Jurassic sediments and Triassic boundary layers Donbas. Publishing house "Naukova Dumka". Kyiv, 144.

Stanislavsky, F. A. (1953). Upper Triassic and Jurassic flora Grand Donbass. Journal Geology of the USSR. Kyiv, 13, 59-65.

Stanislavsky, F. A. (1957). The fossil flora Bathonian-Callovian deposits of the Donets Basin and the Dnieper-Donets Basin. Kyiv, 129.

Stanislavsky, F. A. (1965). Age continental coal-bearing sediments of the northern margin of the Ukrainian Shield. Geol. magazine. Kyiv, 25, 6, 95-98.

Stanislavsky, F. A. (1964). About the age of sediments with plant remains on the border between the middle and upper Jurassic Big Donbass. Geology magazine USSR. Kiev, 24, 101-104.

Stratigraphic scheme of Jurassic deposits of Ukraine (1970). Science Dumka, Kiev, 28.

Stratigraphic scheme of the Phanerozoic and Precambrian Ukraine (1993). Ukraine UMSK. Gos. Ukraine Committee for Geology and Mineral Resources Use. Kyiv, 60.

10. Bondarchuk, V. G. ed. (1985). Stratigraphic Dictionary Ukrainian SSR. Science Dumka, Kyiv, 237.

11. Hozhyk, P. F. ed. (2012). Stratigraphical Codex of Ukraine 2nd ed. Ans. Kyiv, 66.

12. Hozhyk, P. F. ed. (2013). Stratigraphic Upper Proterozoic and Phanerozoic Ukraine. Vol. 1. Stratigraphy Upper Proterozoic, Paleozoic and Mesozoic Ukraine. Kyiv Institute of Geological Sciences of Ukraine. Logos, 637.

13. Yamnychenko, I. M. ed. (1969). Stratigraphic of the USSR. T. 7. Jurassic. Kyiv, Science Dumka, 216.

14. Shevchuk, O. A. (2012). Dinocysts of Callovian deposits of Central Ukraine. Algology, Kyiv, 4, 409-417.

15. Shevchuk, O. A. (2007). New palynological data characteristics to the middle Jurassic sediments south aboard the Dnieper-Donets basin. Paleontol. Coll. Lviv, 39, 56-65.

16. Shevchuk, O. A. (2008). Paleogeographic conditions on the eastern slope of the Ukrainian shield in Сallovian and early Cretaceous time (palynological data). Biostratigraphic schemes Phanerozoic stratigraphic Ukraine: Coll. Science. pr. Inst Geol. Sciences of Ukraine. Kyiv, 101-106.

17. Shevchuk, O. A. (2007). The first palynological data for characteristics Callovian and Late Albian sediments surrounding area City Kanev. From geology to the biosphere. The problems of the present, the future prospects. Kyiv, 30-31.

18. Shramkova, G. V. (1963). The spore-pollen complexes of Mesozoic sediments northwest of Donbas and the Dnieper-Donets Basin. Tr. Voronezh. Univ. Geol. Sat, Voronezh, 62, 93-98.

19. Ogg, J. G., Ogg, G., Gradstein, F. M. (2008). The Concise Geologic Time scale. Cambridge: Cambridge University Press, 150.

20. Shevchuk, O. and Vajda, V. (2016) Stratigraphy and paleoecology of Middle Jurassic dinocyst assemblages from the Dnieper-Donets Basin of central Ukraine. Paper 5193, Symposium,44, 1. Palaeontology and Palaeo-anthropology, 35th International Geological Congress, Cape Town, South Africa, 1.

Published

2017-03-21

Issue

Section

Geology