Recording Kimmeridgian Palaeoclimate Changes Using Biofacial and Isotopic Analyses of Benthic Foraminifers From Normandy (Northwest France)

Article Article scientifique Article Recording Kimmeridgian Palaeoclimate Changes Using Biofacial and Isotopic Analyses of Benthic Foraminifers From Normandy (Northwest France) eng 2026-07-21 2026 author Colpaert Clémentine Peggy University of Geneva 429232 Services communs du département des sciences de la terre (DETCO) author Friedrich Oliver 0000-0002-6046-7513 University of Heidelberg author Samankassou Elias 0000-0003-0385-7686 University of Geneva 636960 Services communs du département des sciences de la terre (DETCO) author Fischer Alexa 0009-0005-2313-0574 University of Heidelberg 10.1029/2025PA005328 2572-4525 The following database results from the campaign 7817857/OF/AvH_Normandy; label event NORM-2023. The following observations made on the composition, abundance, and diversity of Kimmeridgian benthic foraminiferal assemblage have been compared with geochemical and mineralogical data in order to understand the dynamic of changes in depositional and climate conditions and its impact on the ecosystem. Methodology includes an analysis on the generic composition of Kimmeridgian benthic foraminiferal assemblages from Normandy, NW France. The study is based on 28 samples collected in discontinuous cliffs that run northwards from Le Havre, towards Cauville in Normandy, NW France. To extract the foraminiferal tests, sediment samples were dried, weighed, and disaggregated using tap water. The residue obtained was then sieved through a 63 μm mesh and is currently stored in the collection of the Institute of Geosciences at Geneva University (Germany). Foraminiferal specimens were manually picked with a needle under a light microscope. All foraminifers were counted for each sample. Then, the resulting database was standardized to 50 g of washed sediment. Samples have been collected in the discontinuous cliffs that run northwards from Le Havre, towards Cauville in Normandy, NW France. The following sections are studied: Cap de la Hève Section (HE) 49.5119,0.0672, 2M; Saint Andrieux Section (SA) 49.5414,0.0841, 1M ; and Tronquay Section (TR) 49.5350,0.0810 1M. Event label Reophax Nodosaria Counting >63 µm fraction Benthic foraminifera Spirillina Citharina Tristix Citharinella Haplophragmoides Conorboides Ophthalmidium Textularia Paleogaudryina Lenticulina Vaginulina Marginulina Rhizammina Marginulinopsis Upper Jurassic Pseudolamarckina Verneuilinoides Ramulina Dentalina Conorbina Trochammina Planularia Triplasia Falsopalmula Astacolus Sample ID Pseudonodosaria Epistomina Outcrop sample Saracenaria Eoguttulina Ammobaculites Dewey 550 Swiss National Science Foundation Late Paleozoic carbonate platforms and reefs 160019 CH 42 Département des sciences de la Terre 154 false 671 Sedimentology, Biostratigraphy and Micropaleontology Paleoceanography and paleoclimatology 756542c6-367a-4e25-8623-ca38109083cf Article (Published version) Public Colpaert_Et_Al_2026_Paleoceanog_and.pdf 6994269 application/pdf CC BY-4.0 483462824e6d745dfa131477477c79a4141ce6a5af2cd62337785619e276ba6a openAccess Faculté des sciences / Section des sciences de la Terre et de l'Environnement / Département des sciences de la Terre

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Recording Kimmeridgian Palaeoclimate Changes Using Biofacial and Isotopic Analyses of Benthic Foraminifers From Normandy (Northwest France)	Paleoceanography and paleoclimatology			2026	2	14

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Colpaert, Clémentine Peggy