Late Santonian bioevents in the Schattau section, Gosau Group of Austria – implications for the Santonian–Campanian boundary stratigraphy

The Schattau section in the Gosau Group (Northern Calcareous Alps) records a late Santonian interval in the northwestern Tethys. The crinoid Marsupites laevigatus, which indicates the lower part of the latest Santonian Marsupites zone, has been found within a Micraster bed in the Bibereck Formation. Co-occurring ammonites, such as Boehmoceras arculus and Placenticeras maherndli, indicate a late Santonian age. The upper Santonian zonal markers...