Russian regional Carboniferous stratigraphy

Abstract

Several existing schemes for Carboniferous stratigraphy officially adopted in regions of the Russian Federation are summarized and discussed. These regions with different geological histories and distinct depositional settings include the Moscow Basin, the Urals, North Timan, Siberia, the Kuznetsk Basin, the Mongol-Okhotsk Region, and the Verkhoyansk-Okhotsk Region, and Kolyma-Omolon Region. Region. Broad correlations based on macro- and microfossils are possible between the regions, while all regional schemes are correlated to the official Russian General Stratigraphic Scheme for the Carboniferous, using zonations based on orthostratigraphic fossils. The Russian General Stratigraphic Scheme is correlated to the International Stratigraphic Scale using ammonoids, conodonts, foraminifers and palynomorphs.

Discovery of Late Mississippian (late Serpukhovian)–Early Pennsylvanian (earliest Bashkirian?) foraminiferal assemblages from the Sanandaj–Sirjan Zone, Iran: Biostratigraphic and palaeoenvironmental implications

“…The most species-diverse foraminiferal assemblage was identified in the assemblage with P. utkaensa and Plectostaffella F I G U R E 1 0 Correlation of the regional subdivisions of Russia (Alekseev et al, 2022;Postanovleniya, 2003), Donets Basin (Nemyrovska, 2017Poletaev et al, 2013) (Alekseev et al, 2022;Postanovleniya, 2003), Donets Basin (Nemirovska, 2017;Poletaev et al, 2013); south Urals (Kulagina, Nikolaeva, Pazukhin, & Kochetova, 2014;Nikolaeva et al, 2017); and middle Urals (Postojalko, 1990;Stepanova, 2018) Kochetova, 2014;Ponomareva, 2004) and possibly correlates with the lower part of the Plectostaffella bogdanovkensis Zone of the General Stratigraphic Scale of Russia (Figure 11).…”

“…For comparison with the Serpukhovian‐type region, it is possible to use the data on the Tarusian, Steshevian, and Protvian regional substages. In the Stratigraphic Scale of the Russian Platform, the upper Serpukhovian includes the Protvian and Zapaltyubian regional substages and the lower Bashkirian corresponds to the Voznesenkian and Krasnopolyanian regional substages (Alekseev et al, 2004, 2022; Postanovleniya, 2003) (Figure 10). The Mid‐Carboniferous boundary in the Moscow Basin is marked by a gap, therefore, for the East European Platform, subdivisions of Donets Basin (Zapaltyubian and Voznesenkian) were used, where this interval is represented by a complete sequence (Aizenverg et al, 1978).…”

“…Correlation of the regional subdivisions of Russia (Alekseev et al, 2022; Postanovleniya, 2003), Donets Basin (Nemyrovska, 2017; Poletaev et al, 2013), British Isles (Cózar & Somerville, 2014; Richards, 2013), and Arrow Canyon, Southern Nevada (Brenckle et al, 2019; Groves et al, 1999)…”

“…Correlation of the foraminiferal‐based biozonal schemes at the upper Serpukhovian–lower Bashkirian in Iran (Sanandaj–Sirjan zone), Russian general stratigraphic scale (Alekseev et al, 2022; Postanovleniya, 2003), Donets Basin (Nemirovska, 2017; Poletaev et al, 2013); south Urals (Kulagina, Nikolaeva, Pazukhin, & Kochetova, 2014; Nikolaeva et al, 2017); and middle Urals (Postojalko, 1990; Stepanova, 2018). Biseriella minima ‐ E .…”

“…In the South Urals, the first appearance level of G. bulloides is recorded in the Protvian, in the Monotaxinoides subplanus-Eostaffellina actuosa Zone in the Muradymovo section (Kulagina, Nikolaeva, Pazukhin, & Kochetova, 2014), but this single F I G U R E 5 Selected late Serpukhovian-earliest Bashkirian? Foraminifers belonging to orders Ammodiscida Fursenko, 1958;Parathuramminida Mikhalevich, 1980;Earlandiida Cummings, 1955;and Archaediscida Poyarkov & Skvortsov, 1979 Plectostaffella acuminulata and P. utkaensa are characteristic of the uppermost Serpukhovian (Staroutkinskian Substage) of the western subregion of the Urals (Alekseev et al, 2022;Stepanova, 2018).…”