Sequence composition and conodonts of the Kara Formation (Lower Carboniferous) of the Amderma District of the Northern Pay-Khoy

Журавлев, А. В.; Герасимова, А. И.

doi:10.19110/2221-1381-2016-1-3-10

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“…Despite the importance of conodonts for biostratigraphic purposes in the upper Tournaisian deep-water successions, very little has been reported on the conodont faunas in the NE Laurussia (recent Polar Urals and Pai-Khoi) (Zhuravlev 2003;Zhuravlev and Gerasimova 2016a). Data on ostracodes in the bathyal deposits of this region are absent.This article is aimed to characterize of the conodont and ostracode associations came from the bathyal Polar Urals section.…”

Section: Introductionmentioning

confidence: 99%

Conodonts and ostracodes from the late Tournaisian bathyal sequence of the Polar Urals

Журавлев¹,

Sobolev²

2018

Contemporary Trends in Geoscience

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Early Carboniferous (late Tournaisian) conodonts, recovered from siliceous shales and silicites of the Nyan- Vorga Formation within the Lemva tectonic belt of the Polar Urals (Russia), include the biostratigraphically important taxa Siphonodella lanei, Gnathodus typicus, Dollymae hassi, and Scaliognathus anchoralis, marking the following conodont zones of the upper Tournaisian: crenulata, typicus, and anchoralis. Associated species include representatives of genera Siphonodella, Polygnathus, Pseudopolygnathus, Dollymae, Gnathodus, Kladognathus, and Idioprioniodus. These conodont faunas provide the first biostratigraphically constrained correlations between bathyal deposits of the Lemva Allochthone in the Polar Urals and the “standard” conodont zonation. Ostracodes found in the silicite of the typicus Zone are represented by Sagittibythere ? sp. and Tricornina (Bohemia) sp. The ostracodes are reported from the bathyal deposits of Urals for a first time. The traces of the global Mid-Aikuanian Event are recognized in the upper part of the Tournaisian bathyal succession. This event led to turnover in conodont associations and is followed by increasing in conodont diversity.

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Section: Introductionmentioning

confidence: 99%