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Middle ordovician carbonate facies development, conodont biostratigraphy and faunal diversity patterns at the Lynna River, northwestern Russia

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dc.contributor.author Lindskog A.
dc.contributor.author Eriksson M.E.
dc.contributor.author Rasmussen J.A.
dc.contributor.author Dronov A.
dc.contributor.author Rasmussen C.M.Ø.
dc.date.accessioned 2021-02-25T20:46:16Z
dc.date.available 2021-02-25T20:46:16Z
dc.date.issued 2020
dc.identifier.issn 1736-4728
dc.identifier.uri https://dspace.kpfu.ru/xmlui/handle/net/162378
dc.description.abstract © 2020 Authors. The Ordovician Period has emerged as a highly dynamic time in Earth history. Comprehensive work on chrono, chemo-and biostratigraphy has resulted in an overall wellconstrained systemic framework, but several local successions around the globe still await detailed analysis in many respects. Herein we perform a highresolution analysis of abiotic and biotic signals in the Lynna River section, a key locality in northwestern Russia. As this section has been pivotal in documenting the temporal evolution of the Great Ordovician Biodiversification Event on Baltica, the macroscopic and microscopic characteristics of the local succession reveal important paleoenvironmental information that ties into the global development during the Middle Ordovician. The results add particularly to the understanding of the characteristics and largescale sedimentary ‘behavior’ of the Baltoscandian paleobasin. Microfacies vary consistently with the macroscopic appearance of the rocks, with intervals characterized by competent limestone being associated with coarser carbonate textures and intervals dominated by marly beds associated with finer textures. Along with carbonate textures, fossil grain assemblages vary in a rhythmic (~cyclic) manner. The local rocks are commonly partly dolomitized, with the proportion of dolomitization increasing upsection. Regional comparisons suggest that the changes in overall macro and microfacies were strongly related to variations in sea level. New highresolution conodont biostratigraphic data largely confirm previous regional correlations based on lithostratigraphy and trilobite faunas, and enable more robust correlations worldwide.
dc.relation.ispartofseries Estonian Journal of Earth Sciences
dc.subject Baltica
dc.subject Carbonate sedimentology
dc.subject Great ordovician biodiversification event
dc.subject Microfacies
dc.subject Paleoecology
dc.subject Sea level
dc.subject St Petersburg region
dc.title Middle ordovician carbonate facies development, conodont biostratigraphy and faunal diversity patterns at the Lynna River, northwestern Russia
dc.type Article
dc.relation.ispartofseries-issue 1
dc.relation.ispartofseries-volume 69
dc.collection Публикации сотрудников КФУ
dc.relation.startpage 37
dc.source.id SCOPUS17364728-2020-69-1-SID85079647580


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  • Публикации сотрудников КФУ Scopus [24551]
    Коллекция содержит публикации сотрудников Казанского федерального (до 2010 года Казанского государственного) университета, проиндексированные в БД Scopus, начиная с 1970г.

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