engleski

The initial marine flooding of the southern Pannonian Basin System: the North Croatian Basin transgression correlates with the Middle Miocene

Integrated calcareous nannoplankton/planktonic foraminifera biostratigraphy has been recently proved for a powerful tool in solving stratigraphic paradigms around the Karpatian/Badenian boundary. Therefore the re-investigation of two most representative boundary outcrops was initiated for stratigraphic re-evaluation and re-calibration of the Miocene marine flooding of the southern Pannonian Basin System.The initial marine sediments at Sokolina (Poljanska) on the Mt. Papuk contain nannoplankton assemblages characterising the NN5 Nannoplankton Zone. In contrast the underlying lacustrine to brackish limy silts and siltstones comprising very poor nannoplankton assemblages point clearly to sudden but continuous transition from fresh-water lake into a marine environment. These new results change dramatically the paleogeographic and geodynamic concept of the southern Pannonian Basin System shifting the datum of its initial marine flooding event for more than 2 m.y.

calcareous nannoplankton/planktonic foraminifera biostratigraphy; Karpatian/Badenian boundary; Miocene marine flooding

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