TY JOUR TI Palynological zonation of the Givetian-Frasnian stratigraphic interval in the Timan-Northern Urals region KW palynozones KW Middle-Upper Devonian KW Timan-Northern Urals region JO Vestnik of geosciences AU Tel'nova, O.P. AU Shumilov, I.K. PY 2023 IS 0 PB FSBI FIC "Komi Scientific Center of the Ural Branch of the Russian Academy of Sciences"