Coniacian-Campanian palynology, carbon isotopes and clay mineralogy of the Poigny borehole (Paris Basin) and its correlation in NW Europe
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The Poigny borehole near Provins (Seine-et-Marne) provides the most complete single pristine section through the Upper Cretaceous Chalk of the Paris Basin. A well preserved and diverse palynoflora including 236 species and subspecies of organic-walled dinoflagellate cysts (dinocysts) is documented from the borehole, together with a high-resolution carbon-isotope curve (δ13Ccarb) for the Coniacian-Campanian interval. Integration of the palynological and δ13Ccarb data provides a basis for a chemostratigraphic and biostratigraphic correlation to England and Germany. Carbon isotope events (CIEs) are used to refine the placement of sub-stage boundaries in the core, and to calibrate and correlate distinctive palynological events with those from other European sections. Thirty-three palynological events in the upper Coniacian-Campanian, judged to be of biostratigraphic significance, are described. Palynological assemblages, the peridinioid/gonyaulacoid (P/G) dinocyst ratio and clay mineralogy are compared to depositional sequences and implicate sea-level as a major driver of palaeoenvironmental change.
Original language | English |
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Journal | Comptes Rendus - Geoscience |
Volume | 354 |
Issue number | S3 |
Pages (from-to) | 45-65 |
ISSN | 1631-0713 |
DOIs | |
Publication status | Published - 2022 |
Bibliographical note
Publisher Copyright:
© 2022 Elsevier Masson SAS. All rights reserved.
- Biostratigraphy, Campanian, Carbon isotopes, Dinoflagellate cysts, Poigny borehole, Santonian, Sea-level change
Research areas
ID: 343168229