The Upper Turonian of the Bohemian Cretaceous Basin (Czech Republic) exemplified by the Úpohlavy working quarry: integrated stratigraphy and palaeoceanography of a gateway to the Tethys
Abstract
The north Bohemian Cretaceous (Bohemian Cretaceous Basin, Czech Republic) is located between the northern temperate areas and the Tethys. As a gateway to the Tethys, lithology, fauna and integrated stratigraphy (litho-, bio-, event, sequence, stable isotope stratigraphy) of the Upper Turonian succession in the Upohlavy working quarry are described.
Due to a large hiatus, the delta(13)C curve cannot be used for stratigraphic purposes at the base of the section. Biostratigraphic and sequence stratigraphic subdivisions permit good correlation with other European Cretaceous basins.
The inoceramid bivalve assemblage enables correlation with the US Western Interior. Palaeoceanographically, a positive peak in the delta(18)O curve above the hiatus indicates the upper part of the Late Turonian cooling event observed in other areas.
The cooling was accompanied by a southward shift of a cool/temperate oceanic biosedimentary system