Turonian ammonites from northwestern Aquitaine,France |
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| Institution: | 1. Oxford University Museum of Natural History, Parks Road, Oxford OX1 3PW, UK;2. Department of Earth Sciences, South Parks Road, Oxford OX1 3AN, UK;3. School of Earth and Environmental Sciences, University of Portsmouth, Burnaby Road, Portsmouth PO1 3QL, UK;1. Réserve naturelle nationale géologique de Haute-Provence, Service Environnement, Conseil départemental des Alpes de Haute-Provence, 13, rue du Docteur-Romieu, CS 70216, 04995 Digne-Les-Bains cedex 9, France;2. Laboratoire du Groupe de recherche en Paléobiologie et biostratigraphie des Ammonites (GPA), Bois-Mésange, quartier Saint-Joseph, 04170 La Mure-Argens, France;3. UMR, CNRS 6118 géosciences, université de Rennes-1, campus Beaulieu, bâtiment 15, 35042 Rennes cedex, France;1. Réserve naturelle nationale géologique de Haute-Provence, Service Environnement, Conseil départemental des Alpes de Haute-Provence, 13 rue du Docteur Romieu, CS 70216, F-04995 Digne-Les-Bains Cedex 9, France;2. Laboratoire Géosciences, UMR-CNRS 6118, Université de Rennes-1, campus Beaulieu, bâtiment 15, F-35042 Rennes Cedex, France;3. Laboratoire du Groupe de recherche en Paléobiologie et biostratigraphie des Ammonites, Bois-Mésanges, quartier St Joseph, F-04170 La Mure-Argens, France;4. Museu Balear de Ciències Naturals, Crt. Palma-Port de Sóller Km. 30, 07100 Sóller (Illes Balears), Spain;5. Department of Earth Sciences, Division of Invertebrates and Plants Palaeobiology, Natural History Museum, Cromwell Road, London SW7 5BD, UK;1. University of Science and Technology Houari Boumediene (USTHB), Laboratory of Geodynamics, Engineering Geology and Planetology (LGGIP), B.P. 32, 16111 El-Alia, Bab Ezzouar, Algiers, Algeria;2. University of Badji Mokhtar, Annaba, Laboratory of Geological Research (LRG), B.P. 12, 23000 Annaba, Algeria;3. Geology Department, Faculty of Sciences, Benha University, Benha, Egypt;4. Department of Geology, Faculty of Sciences, Minufiya University, El-Minufiya, Shibin El Kom, Egypt. GeoZentrumNordbayern, FachgruppePalaoumwelt der Friedrich-Alexander-University at Erlangen-Nürnberg, Loewenichstr. 28, 91054 Erlangen, Germany;5. Dame du Lac 213, 3, rue Henri-Barbusse, 76300 Sotteville-lès-Rouen, France;1. Department of Geology, Faculty of Science, Taibah University, Medina 41411, Saudi Arabia;2. Department of Geology, Faculty of Science, Al-Azhar University, Assiut 71524, Egypt;3. Department of Earth Sciences, University of Oran 2, Mohamed Ben Ahmed, B.P. 1015 El M''naouer 31000, Oran, Algeria;1. Institut für Geowissenschaften, Ruprecht-Karls-Universität, Im Neuenheimer Feld 234, 69120 Heidelberg, Germany;2. Staatliches Museum für Naturkunde, Rosenstein 1, 70191 Stuttgart, Germany;1. Institute of Earth Sciences, Heidelberg University, Im Neuenheimer Feld 234, 69120 Heidelberg, Germany;2. A. Janelidze Institute of Geology, I. Javakhishvili Tbilisi State University, Polytkovskaja str. 31, 0186 Tbilisi, Georgia |
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| Abstract: | The position of the Cenomanian-Turonian boundary is established for the first time in Charente-Maritime, northwestern Aquitaine (France), on the basis of ammonite occurrences and the δ13C isotope curve, corresponding to Oceanic Anoxic Event 2, that straddles the boundary. The earliest Turonian ammonites recognised are a monospecific occurrence of the early early Turonian pseudotissotiine Bageites bakui Zaborski, 1998, previously known only from northern Nigeria. Newly collected material and well-preserved specimens from existing collections supplement previous records, and include species of Placenticeras, Morrowites, Kamerunoceras, Romaniceras (Romaniceras), Spathites (Jeanrogericeras), Mammites, Fagesia, Neoptychites, Choffaticeras (Leoniceras), Collignoniceras and Lecointriceras. These confirm the presence of the upper lower Turonian nodosoides Zone and the lower middle Turonian turoniense and kallesi zones/subzones of authors. |
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| Keywords: | Cephalopods Upper Cretaceous Western France |
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