Abstract
At the Cenomanian/Turonian boundary in the Outer Carpathian basin the sedimentation of black and green Radiolarian shales was replaced by deposition of variegated shales reflecting a distinct change in sedimentary conditions from anaerobic to aeorobic. Sedimentation of the Turonian to Lower Senonian variegated shales preceded uplift of the intrabasinal source areas supplying clastic material for the Upper Senonian to Paleocene turbiditic deposits.
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