TY JOUR TI Stratigraphic range of the Toupugol'egart Formation (Lower-Middle Devonian, Polar Urals) KW tabulatomorphic corals KW calcareous algae KW biostratigraphy KW island arc KW Toupugol'egart Formation KW Emsian KW Eifelian KW Devonian KW Polar Urals JO Vestnik of geosciences AU Plotitsyn, A.N. AU Sobolev, I.D. AU Matveeva, N.A. AU Ivanova, R.M. AU Vikentyev, I.V. PY 2023 IS 0 PB FSBI FIC "Komi Scientific Center of the Ural Branch of the Russian Academy of Sciences"