Integrated stratigraphy and geochemistry of the Jurassic/Cretaceous boundary strata in the Tethyan and Boreal Realms

According to present knowledge, the actually used provisional Boreal and the Tethyan J/K boundaries are heterochronous. All attempts to correlate the boundary J/K beds between the Boreal and the Tethyan realms by biostratigraphic methods failed. The aim of the project is to make a detailed and precise correlation of the J/K boundary interval in the Tethyan and Boreal region on the paleomagnetic (localization of reversed subzones) and geochemical base (included the isotope geochemistry and neutron activated analyses). On several pilot localities in the Tethyan region (e.g. Bosso-Italy, Brodno-Slovakia, Puerto Escaňo-Spain) was already successfully used for correlation the high resolution magnetostratigraphy together with detailed microbiozonation.On the only known J/K boundary section without hiatuses in the Boreal realm - Nordvik peninsula in Russia - was successfully elaborated by high resolution magnetostratigraphy together with ammonite biostratigraphy. The project use the methods of high