Assemblages of vertebrates and zones from the Upper Givetian and Lower Frasnian of the East European Platform and Urals

Ivanov, Alexander

doi:10.19110/geov.2023.1.3

Vestnik of Geosciences

2023

DOI: 10.19110/geov.2023.1.3

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Assemblages of vertebrates and zones from the Upper Givetian and Lower Frasnian of the East European Platform and Urals

Alexander Ivanov

Abstract: The ichthyoassemblages from the Upper Givetian and Lower Frasnian deposits of the East European Platform and Urals. The Ichthyofaunistic zones established for the Main Devonian Field are traced in various subregions of the platform. The detailed phoebodontid zones of the Middle Urals are correlated to the Standard conodont zones.

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2023

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First palynological data from the Amat and Plyavinsky Horizons of the Main Devonian field

Telnova

2023

Lithosphere

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Research subject. Spores of higher plants from the Early Frasnian deposits of the Main Devonian Field. Material and methods. The work is based on the biostratigraphic method with the following stages: determination of the taxonomic composition of palynospectra, substantiation of the host rocks age, and data correlation. Palynological analysis was conducted using an improved technique by I.Kh. Shumilov and O.P. Telnova, which produced positive results. Results. For the first time, spores of higher plants were found in the sections of the Amatsky and Plavinsky Horizons of the Main Devonian Field. The palynospectra of the Podsnetogorsk layers of the Amat and Snetogorsk layers of the Plyavinsky Horizons were described. The palynospectra of the Podsnetogorsk layers are correlated with the palynoassemblage from the upper part of the Timan, and the Snetogorsk layers are correlated with the palynoassembly of the Sargaev Horizons, established in the Timan-Pechora province. The identified palynospectra complement the associations of vertebrate and invertebrate fauna, as well as rare macroflora, previously studied in these sections. The palynospectra from the Snetogorsk beds are correlated with the palynoassemblage of the Cristatisporites deliquescens – Archaeoperisaccus mennerii regional zone of the Timan-Pechora province. The palynozone characterizes the stratigraphic interval corresponding to the rugosa–transitans conodont zones (middle–upper part of the Sargaev Horizon). Conclusions. The established palynoassemblage from the Snetogorsk layers corresponds to the middle part of the Sargaev Horizon – the stratigraphic interval of the rugosa conodont zone. For the first time, the conducted palynological studies established a binding between the regional stratigraphic unit of the Main Devonian Field and the standard conodont zone.

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First palynological data from the Amat and Plyavinsky Horizons of the Main Devonian field

Telnova

2023

Lithosphere

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Assemblages of vertebrates and zones from the Upper Givetian and Lower Frasnian of the East European Platform and Urals

Cited by 1 publication

References 7 publications

First palynological data from the Amat and Plyavinsky Horizons of the Main Devonian field

First palynological data from the Amat and Plyavinsky Horizons of the Main Devonian field

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