Stratigraphy and lithology
Section editor – PhD in geology and mineralogy Kirichkova A.I.
Article # 24_2015 submitted on 05/15/2015 displayed on website on 06/30/2015
29 p.
pdf Complexes of paleobiota in Abalak-Bazhenov deposits in the central part of Western Siberia
The results of comprehensive detailed lithological and paleontological study of core from Abalak and Bazhenov formations on a number of wells of the central part of Western Siberia are presented. The peculiarities of the distribution of macro- and micro-biota residues in the sequence, their taxonomic associations and paleoecology (bivalves, brachiopods, foraminifers, squid, fish, radiolarians, coccolithophores, palynoforms) are described, lithological characteristics of sediments are given. A comparison of the rocks composition with a set of contained fossils is presented. The complexes with paleobiota that have paleoecological nature and are characterized by maximum set of bio taxons are distinguished. As a result, a clear vertical paleoecological zonation is revealed in the studied sediments. It is noted that each of the selected complexes of paleobiota belongs to specific stratigraphic levels of section. These complexes can be traced along the strike of the studied sediments within the entire study area, which is much more than a hundred kilometers. Thus, their lateral distribution is partly controlled by paleostructural factor. On the basis of these results, a scheme of division of Abalak-Bazhenov sediments of the area is proposed.

Keywords: Bazhenov Formation, Abalak Formation, paleontological characteristics, complexes of fauna, paleoecology, microfauna, macrofauna, correlation of sections, Western Siberia.
article citation Panchenko I.V., Balushkina N.S., Baraboshkin E.Yu., Vishnevskaya V.S., Kalmikov G.A., Shurekova O.V. Kompleksy paleobioty v abalaksko-bazhenovskikh otlozheniyakh tsentral'noy chasti Zapadnoy Sibiri [Complexes of paleobiota in Abalak-Bazhenov deposits in the central part of Western Siberia]. Neftegazovaya Geologiya. Teoriya I Praktika, 2015, vol. 10, no. 2, available at: http://www.ngtp.ru/rub/2/24_2015.pdf
DOI http://dx.doi.org/10.17353/2070-5379/24_2015
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