Carbon isotopes, palynology and stratigraphy of the Santonian–Campanian boundary: The GSSP auxiliary sections, Seaford Head (England) and Bocieniec (Poland), and correlation between the Boreal and Tethyan realms
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The stratigraphy and palynology of the upper Santonian–lower Campanian (Uintacrinus socialis–Gonioteuthis quadrata zones) Newhaven Chalk are described for the Campanian auxiliary GSSP section at Seaford Head, England. A new high-resolution bulk-sediment carbonate carbon stable-isotope (δ13Ccarb) curve provides the basis to refine the carbon-isotope event (CIE) stratigraphy of the section. Results are compared to a complementary palynological study of a second Campanian auxiliary GSSP section (U. socialis–O. pilula zones) at Bocieniec, Poland. Palynological assemblages are dominated by organic-walled dinoflagellate cysts (dinocysts; 208 taxa) at both sites. A stratigraphic framework is established via review of published lithostratigraphic, macrofossil, foraminifera and calcareous nannofossil records from the study sites. Carbon isotope curves with 13 major named CIEs provide a basis for correlation of Seaford Head and Bocieniec to sections at: Trunch, England; Poigny, France; Lägerdorf, Germany; and the Campanian GSSP at Gubbio, Italy. Correlations are constrained by biostratigraphic records, including dinocyst events. The Late Santonian δ13C Event (LSE, previously termed the Santonian–Campanian Boundary Event, SCBE) provides a key correlation level between Boreal and Tethyan sections and enables the placement of base Campanian markers: extinction levels of the crinoid Marsupites and the planktonic foraminifera Dicarinella asymetrica; the first appearance of the calcareous nannofossil Aspidolithus parcus parcus; and the C34n/C33r magnetozone boundary (the primary Campanian marker), in both Boreal and Tethyan sections. A holostratigraphy for the Santonian–Campanian boundary interval that integrates CIEs, macrofossils, benthic and planktonic foraminifera, calcareous nannofossils, dinocysts and magnetostratigraphy is presented. Rhynchodiniopsis juneae sp. nov. is described.
| Originalsprog | Engelsk |
|---|---|
| Artikelnummer | 105415 |
| Tidsskrift | Cretaceous Research |
| Vol/bind | 143 |
| Antal sider | 45 |
| ISSN | 0195-6671 |
| DOI | |
| Status | Udgivet - 2023 |
Bibliografisk note
Funding Information:
Field assistance at Seaford Head was ably provided by Kevin Attree, Tara Brodie, Simon Crust, Delano Henry (Kingston University London), Kresten Anderskouv, Toms Buls (University of Copenhagen) and Madeleine Vickers (University of Oslo). Malcolm Jones (Palynological Laboratory Services Limited, PLS) is thanked for the preparation of the palynological samples. Iain Prince (Shell USA) provided unpublished data from his palynological study of Whitecliff, IOW. IJ was funded by UK Natural Environment Research Council (NERC) grant NE/H020756/1 . Support by Evolution Applied Limited to MAP and Equinor Energy AS (previously Statoil ASA) to IJ (contract 4502311303) is gratefully acknowledged. Preparation of palynological samples from Bocieniec was funded by the National Science Centre of Poland (grant 2020/37/B/ST10/00287 to AJ). NT and JM acknowledge Carlsbergfondet CF16-0456 for funding travel expenses, sampling, and geochemical analysis. Poul Schiøler, Irek Walaszczyk and editor Eduardo Koutsoukos are thanked for their careful reviews and suggestions for improving the manuscript.
Funding Information:
Field assistance at Seaford Head was ably provided by Kevin Attree, Tara Brodie, Simon Crust, Delano Henry (Kingston University London), Kresten Anderskouv, Toms Buls (University of Copenhagen) and Madeleine Vickers (University of Oslo). Malcolm Jones (Palynological Laboratory Services Limited, PLS) is thanked for the preparation of the palynological samples. Iain Prince (Shell USA) provided unpublished data from his palynological study of Whitecliff, IOW. IJ was funded by UK Natural Environment Research Council (NERC) grant NE/H020756/1. Support by Evolution Applied Limited to MAP and Equinor Energy AS (previously Statoil ASA) to IJ (contract 4502311303) is gratefully acknowledged. Preparation of palynological samples from Bocieniec was funded by the National Science Centre of Poland (grant 2020/37/B/ST10/00287 to AJ). NT and JM acknowledge Carlsbergfondet CF16-0456 for funding travel expenses, sampling, and geochemical analysis. Poul Schiøler, Irek Walaszczyk and editor Eduardo Koutsoukos are thanked for their careful reviews and suggestions for improving the manuscript.
Publisher Copyright:
© 2022 The Author(s)
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