Abstract

Abundant and diverse dinoflagellate assemblages characterized Palaeogene sections in eightten DSDP coreholes from the North Atlantic Oceans basins. Zonation of the coreholes (located in the Gulf of Mexico, Sohm Abyssal Plain, Newfoundland Basin, Rockall Plateau and Norwegian Basin) has been almost exclusively on planktonic foraminifera and nannoplankton. The following zones contain diagnostic dinoflagellate assemblages: nannoplankton zones NP 9–11, NP 12, NP 13, NP 16–17, NP 19/20, NP 24 and NP 25. Preliminary occurrence data for more than fifty species of dinflagellates aer presented for these NP zones. Our goal is to produce a dinoflagellate zonation comparable in precision to the two standard planktonic microfossil zonations, allowing correlation across the entire spectrum of marine environments using a single group of microfossils.

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