Coniacian–Campanian palynology, carbon isotopes and clay mineralogy of the Poigny borehole (Paris Basin) and its correlation in NW Europe

The Poigny borehole near Provins (Seine-et-Marne) provides the most complete single pristine section through Upper Cretaceous Chalk of Paris Basin. A well preserved and diverse palynoflora including 236 species subspecies organic-walled dinoflagellate cysts (dinocysts) is documented from borehole, together with a high-resolution carbon-isotope curve (δ 13 C carb ) for Coniacian–Campanian interval. Integration palynological δ data basis chemostratigraphic biostratigraphic correlation to England Germany. Carbon isotope events (CIEs) are used refine placement sub-stage boundaries in core, calibrate correlate distinctive those other European sections. Thirty-three upper Coniacian–Campanian, judged be significance, described. Palynological assemblages, peridinioid/gonyaulacoid (P/G) dinocyst ratio clay mineralogy compared depositional sequences implicate sea-level as major driver palaeoenvironmental change.