THE UPPER CARBONIFEROUS FORAMINIFERAL ZONATION IN THE NORTH URALIAN REGION

Abstract

New data on the vertical and lateral distribution of key fusulinid species revealed peculiar features of their communities in the North Uralian region. The Kasimovian Stage includes here all zonal species known in the Urals and East European platform, whereas regional fusulinids are characteristic of the Gzhelian Stage. The upper stage of the Carboniferous incorporates only the Triticites rossicus and Daixina tschernovi zones. The Carboniferous-Permian boundary is placed at the base of the Daixina robusta Subzone attributed to the lower part of the standard Schwagerina fusiformis-Sch. vulgaris Zone.