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NEW FINDS OF THE LATE VENDIAN SMALL-SHELLED FAUNA IN THE KAYANCHA FORMATION OF THE KATUN ANTICLINORIUM (GORNY ALTAI)

A. A. Terleev 1, M. M. Buslov 2, E. S. Rubanova 2, D. A. Tokarev 1

1 Trofimuk Institute of Petroleum Geology and Geophysics SB RAS, Novosibirsk, Russia; 2 Sobolev Institute of Geology and Mineralogy SB RAS, Novosibirsk, Russia

The northern part of Gorny Altai is characterized by discovered paleontological remains of small-shelled fauna Cloudina sp., Ramifer angulosus Jank., Namacalathus sp. and cyanobacteria (calcareous algae) Girvanella sp., Korylophyton sp. in the stratotype of the carbonate Kayancha Formation characterizing its age as the Late Vendian. Carbonate rocks belong to the formations of the Katun paleoseamount, which is included in the accretion prism of the Kuznetsk-Altai island arc. Currently, finds of this fauna have been found in many regions of the world. A massive study of carbonate rocks for the presence of the Late Vendian fauna will make it possible to refine regional stratigraphic schemes, conduct stratigraphic correlation and clarify geodynamic models.

Keywords: stratigraphy, paleontology, Paleoceanic islands, small-shelled fauna, Late Vendian, Gorny Altai.

DOI 10.20403/2078-0575-2025-2-17-23

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