Abstract
This study presents the results of a palynological investigation of Albian-Cenomanian sections in the Polish Carpathians. The dinoflagellate cysts assemblages and palynofacies have been studied to examine changes in palaeoenvironments. Several indicators, including analysis of chosen groups of morphotypes of dinoflagellate cysts, the peridinoid/gonyaulacoid ratio, the marine/continental index, species diversity and dominance, have been studied. A simplified classification of organic matter has been used to describe the total palynological content of the studied samples. Several pieces of evidence for a mid-Cretaceous transgression have been recognized on the basis of the composition of selected dinoflagellate morphotypes. Previously described Local Oceanic Anoxic Events have been analyzed on the basis of the palynological record. Oxygen deficiency has been related to a stagnation due to the highstand of sea level.
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