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Biostratigraphy and lithostratigraphy of the Mid-Carboniferous boundary beds in the Muradymovo section (South Urals, Russia)

Published online by Cambridge University Press:  08 October 2013

ELENA KULAGINA ,
SVETLANA NIKOLAEVA ,
VLADIMIR PAZUKHIN  and
NATALIYA KOCHETOVA
ELENA KULAGINA*
Affiliation:
Institute of Geology, Ufa Scientific Centre, Russian Academy of Sciences, Karla Marksa ul.16/2, Ufa 450077, Russia
SVETLANA NIKOLAEVA
Affiliation:
Borissiak Paleontological Institute, Russian Academy of Sciences, Profsoyuznaya ul. 123, Moscow 117997, Russia International Commission on Zoological Nomenclature, Natural History Museum, London SW7 5BD, UK
VLADIMIR PAZUKHIN
Affiliation:
Institute of Geology, Ufa Scientific Centre, Russian Academy of Sciences, Karla Marksa ul.16/2, Ufa 450077, Russia
NATALIYA KOCHETOVA
Affiliation:
Institute of Geology, Ufa Scientific Centre, Russian Academy of Sciences, Karla Marksa ul.16/2, Ufa 450077, Russia
*
†Author for correspondence: [email protected]
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Abstract

The uninterrupted succession of the Mississippian–Pennsylvanian boundary beds in the Muradymovo section in the South Urals contains diverse fossils and has a high correlative potential. The Muradymovo section is located in the Zilair Megasynclinorium (ZM), which belongs to the West Uralian Subregion and displays carbonate-siliciclastic deep-water facies of the Bukharcha Formation, which is partly Serpukhovian (Kosogorian, Protvian and Yuldybaevian) and partly Bashkirian (Syuranian). In the southern ZM, the lower part of the formation contains argillaceous carbonates with beds of shale and siltstone, subordinate clastic limestones and limestone breccia, while the upper part is mostly limestone with cherty interbeds. In the north of the ZM, the formation mainly consists of limestone. The Muradymovo succession contains no identifiable gaps in the Mid-Carboniferous Boundary (MCB) portion and has a succession of foraminiferal, conodont, ammonoid and ostracod zones. The MCB in this section coincides with the base of the Bogdanovkian and is defined by the entry of Declinognathodus noduliferus. This level falls within the upper part of the foraminiferal Monotaxinoides transitorius Zone, is near the base of the ammonoid Homoceras–Hudsonoceras Genozone and can be correlated worldwide.

Keywords

Mid-Carboniferous boundarybiostratigraphyammonoidsmicrofossilsSouth Urals
Type
Original Articles
Information
Geological Magazine , Volume 151 , Issue 2 , March 2014 , pp. 269 - 298
Copyright
Copyright © Cambridge University Press 2013 

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