Diversity, stratigraphy and ecology of diatoms and plant pollen in the Miocene-Pliocene sediments of the Vitim Plateau (Baikal region, Russia)

We performed lithogeochemical and biostratigraphical studies of the core from the hole 8182 in the Northern paleovalley of Vitim Plateau. According to lithogeochemical characteristics of the sediments in the section, 5 members were found out. Three lower ones characterize the Dzhilinda suite, two up...

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Bibliographic Details
Main Authors: Usoltseva, Мarina, Titova, Lyubov’, Hassan, Abdulmonem, Reshetova, Svetlana, Rodionova, Еlena, Maslennikova, Мarina, Chuvashova, Irina, Rasskazov, Sergei
Format: Article in Journal/Newspaper
Language:English
Published: Altai State University 2023
Subjects:
Diatom
Miocene
Palynological analysis
Pliocene
Vitim Plateau
Sibirica
Online Access:http://journal.asu.ru/biol/article/view/13604
https://doi.org/10.5281/zenodo.8373408
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Summary:We performed lithogeochemical and biostratigraphical studies of the core from the hole 8182 in the Northern paleovalley of Vitim Plateau. According to lithogeochemical characteristics of the sediments in the section, 5 members were found out. Three lower ones characterize the Dzhilinda suite, two upper ones – the Khoygot stratum. The analysis of biodiversity and fossil diatom algae distribution in the core resulted in revealing of 137 species and varieties of diatom algae related to 50 genera. Four diatom zones (DZ) were established by appearing or disappearing of index species. Ecological and geographic analysis showed domination of planktonic, indifferent, cosmopolite species. Palynological analysis revealed three pollen members with reconstruction of vegetation of forest type reflecting the vector of cooling and climate change from moderately warm one in Middle-Late Miocene to moderately cool in Early Pliocene.

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