Towards an Aptian (Lower Cretaceous) ammonite biostratigraphy of the Mina Texali section,Central Atlantic province (Puebla State,Central Mexico) |
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| Institution: | 1. Instituto de Geología, Universidad Nacional Autónoma de México, Ciudad Universitaria, Coyoacán, 04510, México, D.F., Mexico;2. Departamento de Ingeniería Geológica, Facultad de Ingeniería, Universidad Nacional Autónoma de México, Ciudad Universitaria, Coyoacán, 04510, México, D.F., Mexico;3. Sovereign Pharmaceuticals, 7590 Sand St., Fort Worth, 76118, TX, United States;4. Département des Sciences de la Terre, Université de Nice-Sophia Antipolis, 28 Avenue Valrose F-06100 Nice, France;5. Facultad de Estudios Superiores Iztacala, UNAM, Tlalnepantla, Estado de México, 54070, Mexico;1. CICTERRA CONICET, Universidad Nacional de Córdoba, Av. Vélez Sarsfield 1611, X5016GCA Córdoba, Argentina;2. Department of Geology and Geophysics, Yale University, New Haven, CT, 06511, USA;3. Museo Geológico del Seminario, Diputación 231, 08007 Barcelona, Spain;4. Departament de Bioquímica i Biologia Molecular, Facultat de Biologia, Universitat de Barcelona, Diagonal 643, 08028, Barcelona, Spain;1. Max Planck Institute of Microstructure Physics, Weinberg 2, 06120 Halle, Germany;2. Institute for Solar Energy Research Hamelin (ISFH), Am Ohrberg 1, 31860 Emmerthal, Germany;1. School of Mining Engineering, University College of Engineering, University of Tehran, P.O. Box 11365-4563, Tehran, Iran;2. Senckenberg Naturhistorische Sammlungen Dresden, Museum für Mineralogie und Geologie, Sektion Paläozoologie, Königsbrücker Landstr. 159, D-01109 Dresden, Germany;1. State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China;2. School of Earth Sciences and Engineering, Nanjing University, Nanjing 210093, China;3. Department of Geoscience, University of Calgary, Calgary, AB T2N 1N4, Canada;1. Division of Cardiology, Department of Pediatrics, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand;2. Bangkok Heart Hospital, Bangkok, Thailand;1. Autonomous Noncommercial Organization: Laboratory–Studio “Live Earth”, Tagilskaja 4, 113184 Moscow, Russia;2. Museum of Natural History (Leibniz Institute) at Humboldt University, Invalidenstrasse 43, 10115 Berlin, Germany |
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| Abstract: | This work is a study of the ammonite record of a new stratigraphic section of Aptian age, at the Mina Texali (Puebla State, Central Mexico). A detailed biostratigraphic analysis was carried out on 309 specimens systematically sampled on a bed-by-bed basis. An Aptian ammonite zonation is proposed for the Mina Texali (= MT) section with two interval zones, Dufrenoyia justinae and Caseyella sp., and one informal biostratigraphic unit represented by the Huastecoceras trispinosoides beds. We also analyze the taxonomic composition, paleoecology and some systematic issues of the ammonite record of the MT section. The first record in Mexico of the genera Pseudosaynella, Xerticeras and the nautiloid Heminautilus is identified in this section. The ammonite assemblage is assigned to the proximal part of the outer neritic region of the continental shelf. The ammonite record of the studied section is diagnostic in establishing the lower-upper Aptian transition, and the local zonation of the MT provides important data for the development of an Aptian standard ammonite zonation for the Central Atlantic province. |
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| Keywords: | Ammonites Biostratigraphy Aptian Lower Cretaceous Mexico |
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