Stratigraphie und kalkige Nannofossilien des Unter-Apt von Alstätte NRW

A new outcrop of Lower Cretaceous marine sediments (Lower Aptian) is described from Alst\ue4tte (western part of the M\ufcnsterland). The lithostratigraphy, the biostratigraphy, the calcareous nannofossil assemblages and the stable isotope signal (\u3b413Corg are documented. Based on a detailed lithological log the calcareous nannofossil biostratigraphy is being discussed. The studied succession can be attributed to the Flabellites oblongus nannofossil zone of early Aptian age