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Coniacian–Campanian palynology, carbon isotopes and clay mineralogy of the Poigny borehole (Paris Basin) and its correlation in NW Europe
- Source :
- Comptes Rendus. Géoscience, Vol 354, Iss S3, Pp 45-65 (2022)
- Publication Year :
- 2022
- Publisher :
- Académie des sciences, 2022.
-
Abstract
- 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 (${\delta }^{13}$C$_{\mathrm{carb}}$) for the Coniacian–Campanian interval. Integration of the palynological and ${\delta }^{13}$C$_{\mathrm{carb}}$ 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.
Details
- Language :
- English, French
- ISSN :
- 17787025
- Volume :
- 354
- Issue :
- S3
- Database :
- Directory of Open Access Journals
- Journal :
- Comptes Rendus. Géoscience
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.05e18c6fb1c4f059eb534be8eea6735
- Document Type :
- article
- Full Text :
- https://doi.org/10.5802/crgeos.118