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

• Published in: Stratigraphy and geological correlation Vol. 26; no. 5; pp. 552 - 570
• Main Authors: Mitta, V. V., Savelieva, Yu. N., Fedorova, A. A., Shurekova, O. V.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-09-2018; Springer Nature B.V
• 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; Structural Geology; foraminifers; dinocycsts; spores; pollen; ostracodes; ammonites; biostratigraphy; Northern Caucasus; upper Bajocian
• ISSN: 0869-5938; 1555-6263
• DOI: 10.1134/S0869593818050040

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.