TY JOUR TI Catchment Areas Climate Reconstruction Attempt by the Example of Upper Frasnian Kodinka Formation in the Middle Urals KW Geochemistry KW mudrocks KW alteration indices KW source area KW source shift KW Late Devonian KW Middle Urals JO Russian Journal of Earth Sciences AU Mel'nichuk, O.Y. AU Badida, L.V. PY 2026 IS 26 PB Geophysical Center of the Russian Academy of Sciences