Integrated multi-proxy study of the Jurassic-Cretaceous boundary in marine sequences: contribution to global boundary definition

The aim is to contribute the global definition of the Jurassic-Cretaceous boundary integrating magnetostratigraphy, biostratigraphy, geochemistry and sedimentology data. Supplementary data and their evaluation enable to obtain accurate high-resolution stratigraphic schemes with high potential for multi-proxy correlation of selected regions, and sooner or elsewhere studied areas with marine sequences. The data will serve for the creation of database of integrated stratigraphy. Key sections of the research are Isle of Purbeck (England), Le Chouet and St Bertrand's Spring (France), Kurovice and Štramberk (Czech Republic). The correlation of sub-Boreal (Purbeck) and Tethyan regions (sections at Bosso - Italy, Puerto Escano - Spain, Brodno – Slovakia, Barlya – Bulgaria, Fedosiya – Crimea, Mezatepec - Mexico) is of special importance. The research will be carried out in the cooperation with the International Subcommission on Cretaceous Stratigraphy and thus contributing the definition of the boundary, which remains the last boundary of geological formations without global stratotype.