Dynamics of development of the small foraminiferal biota during early Kungurian (Permian) as evidenced from the Chikali section, Middle Urals, Russia - 09/06/19
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Abstract |
The study of taxonomic diversity and dynamics of development of the small foraminifera (SF) at the Artinskian/Kungurian transition in the Chikali section, one of the typical Kungurian successions, revealed four stratigraphically successive SF assemblages. The lowermost assemblage corresponds to the upper part of the Artinskian and three younger assemblages characterize the Kungurian interval. It is shown that the stratigraphic potential of SF makes possible their use for detailed subdivision of a typical Kungurian succession (Chikali section) and interregional correlation of sedimentary successions. The taxa common for Urals, North and North-East Russia include Hemigordius permicus, H. longus, Midiella ovata minima, Omoloniella prima, small specimens of Howchinella (H. semiovalis, H. breggeri, H. impolita), Nodosinelloides mirabilis, N. bella, N. shiknanica, N. cubanicus elongatus, N. pugioidea, Geinitzina chapmani sylvae, G. postcarbonica, G. ex gr. spandeli, Pachyphloia angulata irregularis and Lateenoglobivalvulina ovalis. New comprehensive description of the characteristic species of the early Kungurian Saranian Horizon such as Hemigordius permicus and Midiella ovata minima are given based the study of topotypical material.
Le texte complet de cet article est disponible en PDF.Keywords : Small foraminifera, Permian, Cisuralian, Kungurian, Cisuralian Foredeep, Biostratigraphy
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Vol 63
P. 45-63 - juin 2019 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.
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