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New material comprising more than four thousand specimens of planktonic foraminifers from the lowermost Danian Cerithium Limestone at Stevns Klint, Denmark, reveal significant lateral biostratigraphic differences along the 14 km long cliff. The Cerithium Limestone at Rødvig (Korsnæb) in the southern part of Stevns Klint is dominated by foraminiferal assemblages indicative of the Parvularugoglobigerina eugubina Zone (Pα). This pattern changes laterally towards the north, where the P. eugubina Zone becomes gradually thinner. At the northernmost locality investigated, Holtug quarry, the Cerithium Limestone unit is characterised solely by assemblages of the succeeding Parasubbotina pseudobulloides Subzone (P1a). This indicates that the Cerithium Limestone is diachronous and becomes gradually younger from the southern part of Stevns Klint towards the northern part. The data indicate that a hiatus including all of the P. eugubina Zone is present at the Fish Clay – Cerithium Limestone transition in the northern part of the cliff, whereas such a hiatus cannot be demonstrated in the southern part.

Planktonic foraminifers, biostratigraphy and the diachronous nature of the lowermost Danian Cerithium Limestone at Stevns Klint, Denmark