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UDC (564.7+563.6):551.734.2(571.1) |
THE FIRST DISCOVERY OF MARINE LOWER DEVONIAN DEPOSITS IN THE MOUNTAIN SHORIYA (WESTERN ALTAI-SAYAN FOLDED REGION)
Ya. M. Gutak, V. A. Antonova, O. P . Mezentseva, N. K. Dyachenko, V. N. Tokarev
The paper describes occurrences of the Early Devonian fossils discovered in the Devonian section of the right Kochura River side (Mountain Shoriya). For the present time it is the only discovery of sea animal fossils in the region. Together with corals, pearlworts, and gastropods there are prints of terrestrial plants. The paper gives a detailed analysis of a certain fossil assemblage with a conclusion about its belonging to the upper part of the Lower Devonian Emsian stage (Shanda horizon) of the regional chart of the western Altai-Sayan folded region. The fact that the sea fossils are spread in the Lower Devonian Salair Ridge and accompanying plants occur in the Lower Devonian volcanogenic deposits of the Telbes paleovolcanic structure (Mountain Shoriya), is of particular importance. This is essential for direct correlations of continental volcanogenic-sedimentary and coastal-marine carbonaceous-terrigenous deposits of two spatially distinct regions of the Altai-Sayan folded region.
Key words:Altai-Sayan folded region, Mountain Shoriya, Lower Devonian Emsian stage, fossils of sea animals, Salair Ridge.
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