Abstract
Conodonts, scolecodonts, and foraminifers from the Frasnian Age (Upper Devonian) (Shchigry-16 borehole, Nizhnekrasnoe village, Voronezh anteclise) were studied. Six conodont assemblages were identified: I for the Timan regional stage, II and III for the Sargaevo regional stage, and IV–VI for the Semiluky regional stage. These assemblages were correlated with local zonal subdivisions and the Standard Conodont Zonation. It was established that a shallow-water environment was characteristic of the Timan regional stage; the deepest environment was characteristic of the Semiluky regional stage. Five scolecodont assemblages were identified: 1 and 2 in the Sargaevo regional stage, 3 and 4 in the Semiluky regional stage, and 5 in the upper part of Semiluky and Voronezh regional stages. Two foraminiferal assemblages are distinguished for the Sargaevo and Semiluky regional stages. The characteristic microfossils species are given in plates.
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