TY JOUR TI Lithological characteristics of the Kolgan formation of the south-western part of the East Orenburg arch uplift KW Frasnian stage KW Kolgan formation KW lithotypes KW tempestites KW carbonates KW bioturbation JO Vestnik of geosciences AU Sagdeeva, N.S. PY 2024 IS 0 PB FSBI FIC "Komi Scientific Center of the Ural Branch of the Russian Academy of Sciences"