Determination of the Bashkirian–Moscovian boundary in the Volga region via conodont species<i>Declinognathodus donetzianus</i>Nemirovskaya

Sungatullina, G. M.

doi:10.1017/s001675681300112x

Cited by 7 publications

(7 citation statements)

References 4 publications

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“…In several studies of Lower to Middle Pennsylvanian conodonts (e.g., Ellison 1941;Dunn 1970a;Lane et al 1970;Lane & Straka 1974;Nemyrovska 1999;Fohrer et al 2007;Nemyrovska et al 2011;Sungatullina 2014;Qi et al 2015;Hu et al 2016;Cardoso et al 2017a;Barrick et al 2013), and as our assemblages, the coexistence and grouping of morphotypes in one or more stratigraphic levels ranging from the Morrowan to the Atokan are commonly documented in several localities of North America, South America as well as from the Bashkirian to the Moscovian in Europe. For example, Dunn (1970a;1970b) reports that the Bird Spring and Ely Limestone formations in Nevada, Round Valley Formation in Utah, and Bloyd Formation in Oklahoma include the coexistence of Adetognathus lautus, Idiognathoides convexus and Streptognathodus parvus within the Streptognathodus parvus -Adetognathus spathus Zone, which indicates a middle-upper Morrowan age.…”

Section: Biostratigraphic Considerationsmentioning

confidence: 70%

Pennsylvanian Conodonts and Microfacies From Northeastern Mexico (Tamatán Group, Ciudad Victoria Block)

CASAS-PEÑA,

NAVAS-PAREJO,

JENCHEN

et al. 2024

RIPS

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The biostratigraphic analysis of the Paleozoic sedimentary successions in Mexico is crucial for understanding their age, depositional setting, and paleogeographic implications. This study examined conodonts and microfacies of calcareous strata within the Del Monte Formation of the Tamatán Group in northeastern Mexico. Field observations have led to the identification of three units within the Del Monte Formation: Unit 1, characterized by calcareous sandstone, bioclastic limestone, shale, occasional conglomerate, and dolomitized beds; Unit 2, consisting of conglomerate and/or breccia associated with debris flows; and Unit 3 including turbiditic sandstone and shale. Conodonts were only recognized in Unit 1, with such genera as Idiognathoides, Neognathodus, Idiognathodus and less frequently, Streptognathodus, Adetognathus, and Diplognathodus. The faunal associations include Idiognathoides cf. Id. corrugatus Harris & Hollingsworth, 1933, Idiognathoides sulcatus sulcatus Higgins & Bouckaert, 1968, Idiognathoides convexus (Ellison & Graves, 1941), Idiognathoides asiaticus Nigmadganov & Nemyrovskaya, 1992, Neognathodus cf. N. atokaensis Grayson, 1984, Neognathodus aff. bothrops Merrill, 1972, Neognathodus nataliae Alekseev & Gerelzezeg, 2001 (in Alekseev & Goreva 2001), Streptognathodus parvus Dunn, 1966, Idiognathodus incurvus Dunn, 1966, and Idiognathodus aff. delicatus Gunnell, 1931, suggesting Morrowan and Atokan (Pennsylvanian) ages for the dolomitic limestone and grainstone beds. Five types of microfacies (MF) and several marine facies zone (FZ) have been detected: MF1-bioclastic grainstone and MF2-wackestone deposited at the platform margin (FZ 6 and FZ 7), MF3-dolomitized wackestone representing an inner restricted platform (FZ 8), MF4-mudstone from a deeper water zone (FZ 4), and MF5-siliciclastic beds with bioclasts indicating a high-energy barrier associated with a platform margin (FZ 6). The findings confirm a shallow to deep platform and imply a connection among Mexican peri-Gondwanan basins, including the Tamatán Basin, indicating similarities in sedimentary facies and/or depositional environments linked to the Rheic Ocean during the Early to Middle Pennsylvanian.

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Section: Biostratigraphic Considerationsmentioning

confidence: 70%

Pennsylvanian Conodonts and Microfacies From Northeastern Mexico (Tamatán Group, Ciudad Victoria Block)

CASAS-PEÑA,

NAVAS-PAREJO,

JENCHEN

et al. 2024

RIPS

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“…2010; Nemyrovska & Hu 2018), the Moscow Basin, Urals and Volga region (Alekseev & Goreva, 2001; Kulagina et al . 2009; Sungatullina 2014; Alekseev et al . 2018), South China (Wang & Qi 2003; Ma et al .…”

Section: Resultsmentioning

confidence: 99%

“…donetzianus is easily understood and well recorded in the Donets Basin, Ukraine, and both the Volga region and South Urals in Russia (Nemyrovska et al . 2010; Sungatullina 2014; Alekseev et al . 2019).…”

Section: Figurementioning

confidence: 99%

Evolution of the conodont Diplognathodus ellesmerensis from D. benderi sp. nov. at the Bashkirian–Moscovian (lower–middle Pennsylvanian) boundary in South China

Hogancamp

Lambert

et al. 2020

Papers in Palaeontology

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Conodont assemblages from the Bashkirian-Moscovian boundary interval in the Naqing section, South China have been studied in detail. A landmark-based geometric morphometric analysis of the evolution of Diplognathodus ellesmerensis is presented. This analysis helps demonstrate that a distinct new species, D. benderi sp. nov., is the direct evolutionary ancestor of D. ellesmerensis. The potential of using the first appearance datum (FAD) of D. ellesmerensis as the Bashkirian-Moscovian boundary marker is re-evaluated via biostratigraphic correlations of conodonts and other fossil groups between different palaeogeographical basins. The FAD of D. ellesmerensis from within the D. benderi sp. nov.-D. ellesmerensis lineage is an excellent potential marker to recognize a global Bashkirian-Moscovian boundary because of its global distribution, the abundance of supplementary marker species at similar stratigraphical levels, and the close stratigraphic proximity of the FAD to the traditional Bashkirian-Moscovian boundary, thus largely preserving the original concept of the base of the Moscovian Stage.

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“…Idiognathoides postsulcatus is more widely distributed but is less easy to identify and maybe non-isochronic from region to region. Besides the Donets Basin, the lineage Declinognathodus marginodosus -D. donetzianus (or greater part of it) is known from the Bashkirian-Moscovian boundary transition of the Urals and Volga region of Russia Sungatullina, 2014). Declinognathodus donetzianus was recorded at the base of the Moscovian Stage in its type area Alekseev & Goreva, 2013;Kabanov & Alekseev, 2011).…”

Section: Introductionmentioning

confidence: 99%

Conodont association of the Bashkirian-Moscovian boundary interval of the Donets Basin, Ukraine

Nemyroska

Hu²

2018

Spanish J. Palaeontol.

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Ten sections spanning the Bashkirian-Moscovian boundary interval were studied in the Donets Basin. Six of them contain most representative conodont and foraminifer associations. In this paper we focused on three the most complete sections that include stratigraphically important conodont species, which belong to the Declinognathodus, Idiognathoides, Idiognathodus, Neognathodus, “Streptognathodus”, Mesogondolella and Diplognathodus genera. The majority of those species are widely distributed, which makes the correlation to other areas reliable. Two biotic events in conodont evolution were discovered in these sections. Two conodont lineages established here are considered as potential markers for the definition of the lower boundary of the Global Moscovian Stage: D. marginodosus – D. donetzianus and Id. sulcatus sulcatus – Id. postsulcatus. The conodonts D. donetzianus and Id. postsulcatus, both proposed before as potential markers for the de? nition of the GSSP at the Bashkirian-Moscovian boundary, are described and compared to those from the other areas. The entry of D. donetzianus is updated and con? rmed to the top of the limestone K1 in both sections, the Zolota Valley and the Malo-Mykolaivka sections. The other proposals for the de???? nition of the lower Moscovian boundary by conodonts are discussed. Three conodont zones characterize the Bashkirian-Moscovian boundary interval. These are, in ascending order: the Id. tuberculatus – Id. fossatus Zone and D. marginodosus Zone from the upper Bashkirian, and D. donetzianus Zone from the lower Moscovian. They were recently described and shortly given in this paper.

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Determination of the Bashkirian–Moscovian boundary in the Volga region via conodont speciesDeclinognathodus donetzianusNemirovskaya

Cited by 7 publications

References 4 publications

Pennsylvanian Conodonts and Microfacies From Northeastern Mexico (Tamatán Group, Ciudad Victoria Block)

Pennsylvanian Conodonts and Microfacies From Northeastern Mexico (Tamatán Group, Ciudad Victoria Block)

Evolution of the conodont Diplognathodus ellesmerensis from D. benderi sp. nov. at the Bashkirian–Moscovian (lower–middle Pennsylvanian) boundary in South China

Conodont association of the Bashkirian-Moscovian boundary interval of the Donets Basin, Ukraine

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