Late Visean foraminiferal sequence of the East European Platform (borehole 401 Syzran) as a basis for the zonal scale of Russia
Year: 2025
Type: article
Abstract: A detailed foraminiferal zonation composed of four zones is proposed for the Upper Visean of Russia. The sequence is based on the evolutionary lines Endothyranopsis compressa – End. crassa – End. sphaerica and Ikensieformis proikensis – I. ikensis – I. tenebrosa. Foraminiferal assemblages of this sequence for borehole 401 Syzran of the Volga-Urals subregion of the East European Platform are presented. This section served as the basis for the zonal foraminiferal scale of Russia. Holotypes of some foraminifera species come from this borehole. Zonal foraminiferal assemblages from the thin section collection of Borehole 401 Syzran are illustrated and the distribution of the stratigraphically significant species in the section is shown.
Source: Geologicheskii vestnik
Institutions: Institute of Geology Ufa Scientific Center, Russian Academy of Sciences, Institute of Paleontology A A Borisyak, Ural Branch of the Russian Academy of Sciences, Zavaritsky Institute of Geology and Geochemistry, Perm State University, Geological Institute, Lomonosov Moscow State University, Institute of Geology, Komi Science Centre
Language: English
Subfield: Paleontology
Field: Earth and Planetary Sciences
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W4416723218