@article{gledocs_11858_8576, author = {Niebuhr, Birgit}, title = {Kreidesandsteine auf der Lausitz (Sachsen): Hinweise zu Paläogeographie und Inversionstektonik.}, year = {2018}, volume = {C 553, psf 24}, pages = {51-78}, abstract = {Abstract: Cretaceous sandstones occur in western Lusatia as erosional relicts through mainly as pebbles and large blocks in Cenozoic river gravels. The exposed Weißig-Schullwitz Cretaceous sandstones northeast of the Lusatian thrust fault in Dresden, the Cretaceous sediments in tectonic wedges directly in the fault zone, as well as numerous Cretaceous sandstone components in the “Senftenberg” and “Bautzen Elbe river courses” have shallow marine origins based on their lithology (quartz sandstones with abundant white mica flakes) and their fossil content (mainly different bivalves, also gastropods, serpulids and sea urchins), and dated to Late Cenomanian times. As Upper Cenomanian deposits in the Saxonian and Bohemian Switzerland (Czech Republic) are still covered by 100–450 m thick Turonian to Lower Coniacian quartz sandstones, it can be assumed that the pebbles and blocks of the fluvial sediments come from an originally widespread Cenomanian sandstone cover of the western Lusatian Massif between the Lusatian thrust fault and the Lusatian normal fault. Due to the large similarities in bio- and lithofacies as well as thickness of all Lusatian Cretaceous sandstones with the Unterquader of the Oberhäslich Formation and the sandy, carbonate-free Dölzschen Formation of the Osterzgebirge, a significant tectonic inversion of western Lusatia already in the Cenomanian is unlikely. Western Lusatia and Osterzgebirge are related to the tectonically stable North German shelf area, which was eustatically flooded in the course of the rising Cenomanian sea level. Based on the fact that Upper Cenomanian strata of both deposition areas directly transgressed on Lusatian two-mica granodiorite and Erzgebirge gneisses, the exhumation of the Proterozoic basement must be older than 100 million years. Due to a proposed exhumation age between 85–50 million years for the entire Lusatia, the data, which has been already obtained by various authors, need only to be harmonized for the western Lusatia, if a 2–3 km thick cover of Upper Cretaceous sediments could be assumed.The inversionrelated deformation at the southwestern margin of Lusatia and the simultaneous subsidence of the Elbe depression took place at the earliest during Mid-Coniacian age since between Meißen and Bad Schandau Lower Coniacian (younger than 88 million years) was faulted.}, note = { \url {http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/8576}}, }