Cyanobacteria and algae in the lower Wenlock section of the Chernov Uplift (Arctic region of Russia)
DOI:
https://doi.org/10.17308/geology/1609-0691/2026/3/28-39Keywords:
Chernoff Uplift, Silurian, Wenlock, cyanobacteria, red algaeAbstract
Introduction or Purpose: remains of cyanobacteria and algae from the boundary interval of Lladovery and Wenlock formations in the Bezymyannyi brook section have not been studied to date. The purpose of this work is to describe the newly identified complex of cyanobacteria, algae and problematic microorganisms in the Lower Wenlock section of the Chernoff uplift;
Methodology: the material for the article was a collection of thin sections and rock samples from the Bezymyannyi section, studied using the optical microscopic method;
Results and discussion: a study of the Llandovery-Wenlock boundary interval revealed the presence of the cyanobacterial assemblage Girvanella ramosa; Hedstroemia cf. bifilosa, H. pulchra, H. halimedoidea, the red algae Solenopora ex gr. pinniforma, S. filiformis, S. gotlandica, and the microfossils Halysis sp. and Sphaerina sp., which, in association with corals and stromatoporoids, were the bioherm builders of the organogenic structure in the early Wenlock. The studied microfossil composition is similar to that of the Wenlock assemblages from Sweden, Estonia, Alaska, England, and Podolia;
Conclusion: the obtained data made it possible to supplement the paleontological characteristics of the studied section and confirm the presence of biogeographical connections between distant territories in the Early Silurian.
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References
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