First direct age determination from the Jurassic radiolarian-bearing siliceous series (Jédidi Formation) of northwestern Tunisia |
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Authors: | Fabrice Cordey Mabrouk Boughdiri Houaïda Sallouhi |
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Institution: | 1. « Paléoenvironnements et paléobiosphère », CNRS UMR 5125, UFR des sciences de la Terre, université Claude-Bernard–Lyon-1, 2, rue Dubois, 69622 Villeurbanne cedex, France;2. Département des sciences de la Terre, faculté des sciences de Bizerte, 7021 Jarzouna, Tunisie |
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Abstract: | Our study presents preliminary biostratigraphic results from the Jurassic siliceous series of northwestern Tunisia. For the first time, radiolarians are extracted from the Jédidi formation and provide a direct age determination. They are the first radiolarian fauna documented from Tunisia. Two age assignments are comprised within the following intervals: (1) Late Bathonian–Early Callovian, (2) Late Bathonian–Early Oxfordian. These ages are compatible with recent stratigraphic synthesis proposed for the Jurassic series of Tunisia. The data suggest the correlation of the Jédidi formation with siliceous series of Middle–Late Jurassic age from the external zone of the Maghrebides belt rather than with true oceanic units from the Maghrebian flyschs or the internal zones of western Tethys. To cite this article: F. Cordey et al., C. R. Geoscience 337 (2005). |
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Keywords: | Radiolarites Radiolaria Jurassic Tunisia Biostratigraphy Palaeogeography Radiolarites Radiolaires Jurassique Tunisie Biostratigraphie Paléogéographie |
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