Calcareous nanno fossils from the cretaceous tertiary boundary interval in the barranco del gredero caravaca province murcia southeastern spain part 1

Romein, A.J.T.

Proceedings of the Koninklijke Nederlandse Akademie van Wetenschappen Series B Physical Sciences 80(4): 256-268


Accession: 004865656

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The calcareous nannofossil assemblages are described from a sequence of closely spaced samples from the Gredero section, covering the Cretaceous/Tertiary boundary interval. An emended zonation for this interval is proposed. Additional evidence is given of provincialism and diachronous appearance levels of species in the Late Maastrichtian and Danian. Climatic deterioration plays an important role in the model which is presented to explain the terminal Cretaceous event.