Palaeo7 News

Abstract. Two new species of deflandreoid dinoflagellate cysts are described from the Coniacian and Campanian from the 6406/3–6 well, Tyrihans Field in the Norwegian Sea. Chatangiella islae sp. nov. possesses spines that are uniquely restricted to the cingulum, while Trithyrodinium zakkii sp. nov. is distinguished from other species of the genus by spines arising from the endophragm. These species have…

Abstract. The lowermost 1.45 m of the Welton Chalk Formation, including the regional sedimentary record of Oceanic Anoxic Event 2 (OAE-2), has been sampled at Melton Ross Quarry in eastern England, U.K. The section is investigated for organic geochemistry and stable isotopes for the first time, while a detailed palynological study follows previously published preliminary results….

A high-resolution palynological analysis of the Cenomanian to Lower Campanian in the Trunch borehole, Norfolk (southern North Sea basin) is documented.  This constitutes the most detailed continuous record of organic-walled dinoflagellate cysts (dinocysts) from a single Upper Cretaceous section to date.  A revised stratigraphic framework for the Trunch succession is presented, integrating regionalmarker bed lithostratigraphy,…

Abstract. The abandoned limestone quarry section at Salzgitter-Salder in Germany is a potential candidate for the GSSP (Global Boundary Stratotype Section and Point) of the base of the Coniacian. We present a new high-resolution carbon isotope curve of carbonates (δ13Ccarb) from across the Turonian–Coniacian boundary horizon (TCB) that allows for the precise definition of the Navigation…

Abstract. New palynological and calcareous nannofossil records are presented for the Turonian–Coniacian boundary section at Salzgitter-Salder, Germany, the candidate Coniacian GSSP.  The proposed base of the Coniacian Stage is the base of Bed 46, the first appearance datum level of Cremnoceramus deformis erectus, which is coincident with a δ13C minimum at the top of the Navigation carbon…

Abstract. Following votes in the Coniacian Working Group, the Cretaceous Subcommission and the International Commission on Stratigraphy, on May 1st, 2021, the International Union of Geological Sciences voted unanimously to ratify the Global Stratotype Section and Point (GSSP) proposal for the base of the Coniacian Stage of the Upper Cretaceous Series and Cretaceous System. The lower…

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 (δ13Ccarb) for the Coniacian–Campanian interval. Integration…

At Middlegate Quarry, the Carstone Formation is a c. 0.8 m thick unit of oolitic ferruginous sandstone. It rests unconformably on the lower Kimmeridge Clay Formation (KCF) and is overlain by the Hunstanton Formation (Red Chalk) with an apparently gradational junction. Marine dinoflagellate cysts (dinocysts) are present at a concentration of 9520 to 13 600 specimens per…

Abstract. 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…