Cretaceous rudist-bearing platform carbonates from the Lycian Nappes (SW Turkey): Rudist associations and depositional setting |
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| Institution: | 1. Dokuz Eylül University, Engineering Faculty, Geological Engineering Department T?naztepe Campus, 35160, Buca, ?zmir, Turkey;2. Süleyman Demirel University, Engineering Faculty, Department of Geological Engineering, Isparta, Turkey;3. Ankara University, Engineering Faculty, Department of Geological Engineering, Tando?an, Ankara, Turkey;4. ?stanbul University, Engineering Faculty, Department of Geological Engineering, Avc?lar, ?stanbul, Turkey;1. Faculty of Geography and Biology, Pedagogical University of Cracow, Podchor??ych St. 2a, Kraków 30-084, Poland;2. Faculty of Geology, Geophysics and Environmental Protection, AGH University of Science and Technology, Aleje Mickiewicza 30, Kraków 30-059, Poland;1. Université de Tunis El Manar, Faculté des Sciences de Tunis, Département de Géologie, UR Pétrologie sédimentaire et cristalline, 2092 El Manar, Tunis, Tunisia;2. Department of Earth, Environment and Ecosystems, The Open University, Milton Keynes MK7 6AA, UK;3. Departament de Geologia, Universitat Autònoma de Barcelona, Edifici C, Bellaterra, 08193 Barcelona, Spain;1. Bureau of Economic Geology, Jackson School of Geosciences, The University of Texas at Austin, 10100 Burnet Rd., Bldg 130, Austin, TX 78758-4445, United States;2. Department of Geological Sciences, Jackson School of Geosciences, The University of Texas at Austin, University Station C1100, Austin, TX 78712-0254, United States;3. Shell International E&P, 200 N Dairy Ashford, Houston, TX 77079, United States;1. Dipartimento di Scienze della Terra, dell’Ambiente e delle Risorse (DISTAR), Università degli Studi di Napoli “Federico II”, Largo S. Marcellino, 10, 80138, Napoli, Italy;2. Istituto di Geoscienze e Georisorse (IGG), CNR, Via Giorgio La Pira, 4, 50121, Firenze, Italy;1. Babe?–Bolyai University, Department of Geology and Center for Integrated Geological Studies, M. Kog?lniceanu Str., 1, 400084, Cluj–Napoca, Romania;2. Serbian Academy of Sciences and Arts, Knez–Mihailova 35, 11000, Beograde, Serbia;3. Lerchenauerstr. 167, D–80935, München, Germany;4. Geological Survey of Serbia, Rovinjska 12, 11000, Beograd, Serbia;5. Rudarski Institut, Batajni?ki Drum 2, 11080, Beograd–Zemun, Serbia;6. Kralja Petra I, 38, 11158, Beograd, Serbia |
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| Abstract: | Lycian Nappes (in SW Turkey) lie between the Menderes Massif and Bey Da?lar? carbonates and comprise thrust sheets (nappes piles) of Paleozoic-Cenozoic rocks, ophiolitic and tectonic mélanges and serpentinized peridodites. This study focuses on identification of rudists and their palaeoenvironmental features observed within the Cretaceous low grade metamorphic successions (dominated by recrystallized limestones) from the Tavas and Bodrum nappes. The study is based on fifteen stratigraphic sections measured from Tavas, Fethiye, Köyce?iz, Bodrum, Ören and Bozburun areas. The Lower Cretaceous successions with rudists are very sparse in the Lycian Nappes and a unique locality including a Berriasian epidiceratid-requieniid assemblage is reported so far. A new requieniid-radiolitid assemblage was found within the pre-Turonian (?Albian-?Cenomanian) limestones. Four different Late Cretaceous rudist assemblages were firstly identified as well: 1) Caprinid-Ichthyosarcolitid assemblage (middle-late Cenomanian); 2) Distefanellid assemblage (late Turonian); 3) Hippuritid-Radiolitid assemblage (late Coniacian-Santonian-Campanian); 4) Radiolitid-Hippuritid assemblage (‘middle’-late Maastrichtian). Microfacies data and field observations indicate that the rudists lived in the inner and outer shelves of the Cretaceous carbonate platform(s) in this critical part of the Neotethys Ocean. Rudists formed isolated patchy aggregations in very shallow palaeoenvironments and deposited as shell fragments particularly on the outer shelf environment, which is characterized by higher energy and platform slope characteristics. |
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| Keywords: | Rudists Cretaceous Lycian Nappes Turkey Associations Depositional setting |
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