Upper Albian–upper Turonian calcareous nannofossil biostratigraphy and chemostratigraphy in the Vocontian Basin, southeastern France
Gyawali, Babu Ram; Nishi, Hiroshi; Takashima, Reishi; Herrle, Jens O.; Takayanagi, Hideko; Latil, Jean-Louis; Iryu, Yasufumi
Newsletters on Stratigraphy Volume 50 Number 2 (2017), p. 111 - 139
published: Apr 1, 2017
ArtNo. ESP026005002004, Price: 29.00 €
Integrated framework of calcareous nannofossil biostratigraphy and carbon isotope stratigraphy for the upper Albian to upper Turonian succession has been made in the Vocontian Basin, southeastern France. The upper Albian – upper Turonian succession comprising 13 lithostratigraphic units was compiled from five sections (Moriez, Hyèges, Angles, Vergons, and Lambruisse) in the Vocontian Basin based on lithostratigraphic marker beds, biostratigraphy and chemostratigraphy. We recognized 11 calcareous nannofossil zones based on calcareous nannofossil assemblages. Our composite δ13 C records and calcareous nannofossil bio stratigraphy corresponds well with reference curves for upper Cretaceous successions in Europe (English Chalk, Gubbio Section, Italy) and Western Interior Seaway, USA. We clearly identified the Albian – Cenomanian and Cenomanian – Turonian stage boundaries and two black shale intervals representing Oceanic Anoxic Events; OAE1d and OAE2. We also identified both the Mid-Cenomanian Event and the Late Turonian Event. The consistency of our biostratigraphy and carbon isotope curve with global data confirms that integrated nannofossil biostratigraphy and δ13 C isotope chemostratigraphy can provide an effective tool for correlation with other upper Albian to upper Turonian successions.