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— The isotopic composition and lithology of the hypostratotype of the Bashkirian Stage (Pennsylvanian) in the Askyn River section (Bashkortostan, western slope of the South Urals) are studied. The isotopic study (δ13C, δ18O) was conducted taking the carbonate lithology into account. The succession studied is composed of Upper Serpukhovian, Bashkirian, and Lower Moscovian carbonates of various lithological...
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