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Standard Palaeogene Calcareous Nannoplankton Zonation

Abstract

THE stratigraphic value of a group of marine minute algae usually referred to as the calcareous nannoplankton, first shown by Bramlette and Riedel1, has already been discussed2. A standard zonation, based partly on the investigations of Hay et al.3 and Bramlette and Wilcoxon4, has been proposed, and the Neogene calcareous nannoplankton zones have been numbered NN 1 to NN 21.

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MARTINI, E. Standard Palaeogene Calcareous Nannoplankton Zonation. Nature 226, 560–561 (1970). https://doi.org/10.1038/226560a0

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