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The La Voulte-sur-Rhône Lagerstätte (Middle Jurassic, France)

Abstract : The La Voulte Lagerstätte (Jurassic, France) is characterized by a diverse and exceptionally well-preserved fauna. It was located along the western Tethyan margin where the submarine relief was steep. The sedimentation was dominated by marls suggesting a low energy and deep-water depositional environment. The La Voulte biota is remarkable for its biodiversity with about 60 different species. The major components are the arthropods (50% of the species), the cephalopods (10%) and the echinoderms (10%). Among the arthropods, the composition and some anatomical features suggest a relatively deep-water environment characterized by dim-light conditions. The cephalopods and other organisms (pycnogonids, asterids), have extant analogues that all live in deep-water niches always exceeding 200 m. The fauna as a whole bears the characteristic features of the present-day bathyal fauna. The La Voulte Lagerstätte may be one of the rare Jurassic Lagerstätten, if not the unique, to have fossilized a deep marine fauna.
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Submitted on : Thursday, October 20, 2022 - 4:33:29 PM
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Sylvain Charbonnier, Denis Audo, Bruno Caze, Vincent Biot. The La Voulte-sur-Rhône Lagerstätte (Middle Jurassic, France). Comptes Rendus. Palevol, 2014, 13 (5), pp.369-381. ⟨10.1016/j.crpv.2014.03.001⟩. ⟨mnhn-03823029⟩



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