A revised ammonoid biostratigraphy for the Aptian of NW Africa: Essaouira-Agadir Basin,Morocco |
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| Institution: | 1. University of Manchester, School of Earth and Environmental Sciences, North Africa Research Group, M13 9PL Manchester, UK;2. Aix Marseille Université, CNRS, IRD, Coll France, CEREGE, Aix-en-Provence, Site Saint-Charles – Case 67 – 3, Place Victor Hugo, 13331 Marseille Cedex 3, France;3. Groupement d''Intérêt Paléontologique, Science et Exposition, 60 bd Georges Richard, 83000 Toulon, France;4. Université Ibn Zohr, Faculté des Sciences, Département de Géologie, Laboratoire de Géologie Appliquée et Géo-Environnement (LAGAGE), B.P 8106 Cité Dakhla, Agadir, Morocco;1. CEREGE, Aix-Marseille University, Centre Saint-Charles, 13331 Marseille cedex 03, France;2. Universidad Complutense, Departamento de Estratigrafia, Instituto de Geologia Economica (CSIC-UCM), Facultad de C.C. Geologica, 28040 Madrid, Spain;1. Departamento de Estratigrafía y Paleontología, Facultad de Ciencias, Universidad de Granada, 18002 Granada, Spain;2. Institute of Geological Sciences, Jagiellonian University, Gronostajowa 3a, 30-387 Kraków, Poland;1. Université de Genève, Faculté des Sciences, Département des Sciences de la Terre, Rue des Maraîchers 13, CH 1205, Genève, Switzerland;3. 71 Chemin de Planta, 1223, Cologny, Switzerland;4. Les Repingons, 24 Chemin des Champs d''Amot, 74140, Messery, France;5. I.G.M.E., Spirou Loui 1, Olympic Village, 13677, Acharnes, Greece;1. Exploration Directorate, National Iranian Oil Company, Seoul St., NE Sheikh Bahaei Sq., 1994814695, Tehran, Iran;2. Centre de Recherche sur la Paléobiodiversité et les Paléoenvironnements, UMR CNRS 7072, Université Pierre et Marie Curie Paris 06, 4, Place Jussieu, 75252 Paris cedex 05, France;3. Geology Department, Earth Sciences Faculty, Shahid Beheshti University, 1983963113, Daneshjoo Blvd., Evin, Tehran, Iran;4. Faculty of Sciences, Ferdowsi University of Mashhad, 9177948974, Azadi sq., Mashhad, Iran;1. Geological Survey, National Office of Mines, 24 Energy Street – 2035, Charguia I, B.P. 215, 1080 Tunis, Tunisia;2. Engineering School of Sfax, University of Sfax, Bp. 1173, 3038 Sfax, Tunisia;3. University of Tunis El Manar, Faculty of Sciences of Tunis, Department of Earth Sciences, 2092 Tunis, Tunisia;4. University of Carthage, Faculty of Sciences of Bizerte, Department of Earth Sciences, 7021 Bizerte, Tunisia;5. Tunisian Enterprise of Petroleum Activities (ETAP), 54 Avenue Mohamed V, 1002 Tunis, Tunisia;1. MLR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China;2. Department of Geological Sciences, Freie Universität Berlin, Malteserstr. 74-100, 12249 Berlin, Germany;3. China University of Geosciences, Beijing 100083, China;4. Faculty of Earth Sciences, University of Iceland, Sturlugata 7, Askja, 101 Reykjavík, Iceland |
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| Abstract: | A revised ammonoid biostratigraphy is presented for the Aptian of NW Africa, Essaouira-Agadir Basin (EAB), Morocco, based on detailed analysis of 5 key sections. A number of bio-events are documented and 26 genus and 43 species fully documented, forming the largest published Aptian ammonite collection made from NW Africa. The section at Tiskatine is documented as the type section, and 8 zones and subzones are defined, of which 5 are new. This work allows correlation of the Aptian of the EAB to the Standard Mediterranean Ammonite Scale (SMAS).Two main hiatuses are identified at the scale of the basin scale: a major one that includes most of the lower Aptian and the base of the upper Aptian and a second one encompass the top of the upper Aptian and the base of the lower Albian. The ammonite fauna displays a clear Tethyan palaeobiogeographic character affected by a fairly high degree of endemism at the genus and species level. The new genus and species Elsaisabellia tiskatinensis is introduced. |
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| Keywords: | Ammonite Biostratigraphy Aptian Essaouira-Agadir Basin Morocco |
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