Regionalne-geologicke zhodnoceni sedimentu jury v oblasti jihovychodnich svahu ceskeho masivu

The study area includes the southeast Moravian part of the Czech Republic and the geologic setting comprises the Carpathian fold belt and the Carpathian foredeep. The Jurassic strata are overlain by the autochthonous Paleogene and Miocene covered by nappes of the West carpathian Flysch Belt. The structure and facies of Jurassic sediments on both sides of the Austrian-Czech border, especially of the Malm, are very similar. In the northeast they are very influenced by erosional and tectonical features in the Vranovice and Nesvačilka grabens. deposition of Jurassic strata starts in the Middle Dogger (U. Bajocian-Bathonian) and they include clastic lithofacies in prevailing part of the sequence. These sediments build the Gresten Group of synrift type. Up to now, they have been found locally as relatively thin bodies in South Moravia. Callovian regional transgression deposited mainly sandstones of the Nikolčice beds on the regionally plain surface. The passive margin development in the Malm created carbonate platform (Altenmarkt Formation) in the shallow northwestern peripheral part and a marly slope facies in the southeast. The shaly carbonate Klentnice Formation indicates deepening of the depositional area towards southeast. The thickness of the basal member of the Malmian section (Vranovice carbonates) decreases in this direction while that of the basinal facies (Mikulov marlstones) increases. The Kurdějov Beds reflect the end of the transgression phase and water level oscillation. The Malmian section is terminated by the Ernstbrunn limestone deposition. This topmost litostratigraphic unit is preserved only in the form of local erosive relics. The major lithofacies are shown in a set of maps which could be used for better understanding of Jurassic strata development. The maps include information based on deep borehole data, regional correlation of well logs, seismic profiles and regional geological cross sections and demonstrate the distribution of thickness, structures and facies.