Ammonites, Microfauna, and Palynomorphs from the Lower Part of the Upper Bajocian Parkinsoni Zone of the Basin of the Bolshoi Zelenchuk River, Northern Caucasus

This paper contains the results of a comprehensive study of the standard Rarecostites subarietis Subzone of the upper Bajocian Parkinsonia parkinsoni Zone in sections on the Kyafar River (a tributary of the Bolshoi Zelenchuk River, Karachay-Cherkessia, Russia). The subzone is represented by shales w...

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Bibliographic Details
Published in:Stratigraphy and geological correlation 2018-09, Vol.26 (5), p.552-570
Main Authors: Mitta, V. V., Savelieva, Yu. N., Fedorova, A. A., Shurekova, O. V.
Format: Article
Language:English
Subjects:
Archaeology
Composition
Concretions
Cysts
Earth and Environmental Science
Earth Sciences
Foraminifera
Fossil animals
Fossils
Geophysics/Geodesy
Historical Geology
Jurassic
Marl
Microfauna
Microorganisms
Rivers
Sedimentary structures
Sedimentology
Shales
Structural Geology
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Summary:This paper contains the results of a comprehensive study of the standard Rarecostites subarietis Subzone of the upper Bajocian Parkinsonia parkinsoni Zone in sections on the Kyafar River (a tributary of the Bolshoi Zelenchuk River, Karachay-Cherkessia, Russia). The subzone is represented by shales with marl interbeds and sideritic concretions of the upper member of the Djangura Formation. The taxonomic composition and distribution of ammonites, foraminifers, ostracodes, dinoflagellate cysts, and miospores are established. The characteristic assemblages recognized of microfauna and palynomorphs enabled the recognition of foraminiferal and dinocyst biostratigraphic units for this Middle Jurassic interval. The index fossils are illustrated.
ISSN:0869-5938
1555-6263
DOI:10.1134/S0869593818050040