Devonian Radiolarian Ecozones of Northern Eurasia

Afanasieva, M. S.

doi:10.1134/s0031030120090014

Cited by 2 publications

(1 citation statement)

References 27 publications

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“…К сожалению, все вышеуказанные виды не валидны в связи с тем, что не были описаны и опубликованы автором в открытой печати. Группа радиолярий под родовым названием Entactinia имеет стратиграфическое распространение от самых низов девона до триаса [1]. Представители конодонтов группы Polygnathus costatus широко известны в интервале от верхов эмса (конодонтовая зона patulus) до верхней части эйфеля (конодонтовая зона australis), а Polygnathus willii известен в отложениях эйфельского яруса (конодонтовые зоны partituscostatus) [2].…”

Section: стратиграфияunclassified

Stratigraphic range of the Toupugol'egart Formation (Lower-Middle Devonian, Polar Urals)

Plotitsyn

Sobolev

Matveeva

et al. 2023

Vestnik of Geosciences

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We refined the age of carbonate and clastic volcanomictic rocks of the Toupugol'egart Formation (D1–2tg) of the Voikar Belt of the Polar Urals, which formed at the final stage of the Polar Ural Island arc development. The analysis of the stratigraphic distribution of fossils of the Toupugol'egart Formation was based on a revision of previously published data and new collections of the authors (algae, tabulatomorphic corals). The stratigraphic range of the Toupugol'egart Formation was extended up to the Karpinsky-Langur regional stages of the Emsian Eifelian of the Devonian. The similarities of the structure, lithological composition and paleontological associations of carbonate sequences of the Toupugol'egart Formation and the upper part of the Malyj Ural Formation (Voikar Belt of the Polar Urals), as well as the Terrigenous-Volcanogenic Formation (eastern slope of the Middle Urals) were noted. The accumulation of these deposits took place in the Late Emsian Early Eifelian, probably during joint sedimentary-volcanogenic cycle within a single extended island-arc system. We assumed a similar evolution of the Polar Ural and Tagil island arcs at the final stage of their formation.

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Section: стратиграфияunclassified