Conodonts, ammonoids, foraminifers, and depositional setting of the Serpukhovian and Bashkirian stages in the Kugarchi Section in the South Urals, Russia

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

“…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 .…”

“…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).…”

“…The late Serpukhovian age of units 3 and 4, and the lower part of Unit 5 of the Ghaleh Formation is based on foraminifers that are characteristic of the late Serpukhovian in many sections world‐wide: East European Platform (e.g., Gibshman, 2003 ; Kabanov et al, 2016 ), Donets Basin (Aizenverg et al, 1983 ; Vachard & Maslo, 1996 ), the Urals (Kulagina et al, 1992 ; Kulagina, Nikolaeva, Pazukhin, & Kochetova, 2014 ; Nikolaeva et al, 2017 ; Postojalko, 1990 ; Stepanova, 2018 ; Stepanova & Kucheva, 2006 ), Pre‐Caspian Basin, Kazakhstan (Akhmetshina et al, 2007 ; Brenckle & Collins, 2017 ; Brenckle & Milkina, 2003 ; Collins & Brenckle, 2017 ; Zaitseva & Klenina, 2008 ), British Isles (Cózar & Somerville, 2014 ), Tien Shan (Kulagina et al, 1992 ; Rumjanzeva, 1970 ), and North Africa (Cózar et al, 2011 ; Cózar, Vachard, et al, 2014 ). However, the taxonomic composition of the studied foraminifers has its own characteristics.…”

Foraminifers and conodonts in the Danlu section, South China: implications for the Viséan–Serpukhovian boundary (Mississippian)

“…Nikolaeva et al (2017) interpreted the FOD of L . ziegleri in the Kugarchi section at levels equivalent to the Steshevian and attributed its absence from older levels to hostile settings.…”

“…6) are the Kugarchi and Mariinsky sections in the Urals, Donets (Ukraine), Craven Basin in England and Kilnamona and Lugasnaghta in Ireland (Cózar & Somerville, 2021a). Nikolaeva et al (2017) interpreted the FOD of L. ziegleri in the Kugarchi section at levels equivalent to the Steshevian and attributed its absence from older levels to hostile settings. In the Mariinsky, the well-formed P1 elements of L. ziegleri from the base of the section make Nikolaeva et al (2020) consider that its FOD should be in much lower levels.…”