IZOTOPY UHLÍKU V ORGANICKÉ HMOTĚ SVRCHNOKŘÍDOVÝCH SEDIMENTŮ SLEZSKÉ JEDNOTKY

Organic carbon content and stable organic carbon isotopes were studied in the complete section across the change anoxic to oxic sedimentation in the Bystrý potok stream by Trojanovice (in the vicinity of Frenštát p. R., Czech Republic). Pelitic deposits of the higher Lower Cretaceous and the lower Upper Cretaceous of basinal sedimentation in the Godula development of the Silesian Unit of the Western Carpathians outcrop here. TOC values in the black shales of the Late Albian and Eatly Cenomanian Lhoty Formation is higher (3.59 %). Th e δ13C isotopic values of claystones show positive excursion in the lower part of the Mazák Formation (Upper Cenomanian, ?OAE2) and lower part of the Godula Formation (Upper Santonian)