Santonian ammonite stratigraphy of the Münster Basin, NW Germany

The upper Upper Coniacian and Santonian ammonite stratigraphy of the Munster Basin, Westphalia, NW Germany, is described in the context of regional litho-, inoceramid- and sequence stratigraphy. The null Sphenoceramus pachti null &  S. cardissoides null Zone, previously regarded as basal Santonian, is placed in the uppermost Coniacian. The Lower Santonian corresponds to the null Cladoceramus undulatoplicatus null Zone, the lower Middle Santonian...