Interregional correlation of Permian continental and marine deposits of northeastern Russia, southern Far East, Sibеria, and Pechora Cisurals
Correlation оf the Permian continental and marine deposits of northeastern Russia, southern Far East, Sibеria, and Pechora Cisurals was made. A consistent succession of brachiopod, marine bivalve and ammonoid linked with macrofloras in the boundary deposits of the Periuralian/Biarmian divisions of the Boreal Supra-realm was established. As a result, analogues of the Solikamian, Irenian, Filippovian and Saranian horizons of the Kungurian stage were established in the main coal basins and marine deposits of the North-Eastern Russia and Southern Far East. Correlative floristic dating levels were established within the Boreal Realm stretching from the east of the East European Platform to Pechora Cisurals, Pay-Khoi, Siberia, Kuznetsk Basin, northeastern Russia, and southern Far East. The unity of the Sheshmian-Kazanian non-marine floral assemblages and non-marine bivalves corresponding to Kazanian marine biota and their difference from Kungurian ones was defined. The Kungurian-Kazanian boundary within the Boreal Realm was traced in the marine and continental deposits. The invalidity of the Ufimian Stage was revealed. The Kazanian Stage corresponds to the Roadian stage, but the Kazanian lower boundary is not defined precisely and can be considered isochronous to the Roadian lower boundary of ISS conventionally.