The sclerobionts of the Bajocian Oolithe ferrugineuse de Bayeux Formation from Calvados (Paris Basin,Normandy, France) |
| |
| Institution: | 1. 6, rue des Réservoirs, 76600 Le Havre, France;2. UMR, CNRS 6118, géosciences, université de Rennes I, 35042 Rennes cedex, France;3. Lindenstrasse 53, 72348 Rosenfeld, Germany;4. Palaeontological Department, Natural History Museum, National Museum, Václavské náměsti 68, 11579 Prague, the Czech Republic;5. Ivančická 581, Praha 9, 19900 Letňany, the Czech Republic;1. Univ. Lille, CNRS, UMR 8198–Evo-Eco-Paleo, 59000 Lille, France;2. Université Mustapha Stambouli de Mascara, Faculté des Sciences de la Nature et de la Vie, BP 305, Route de Mamounia, 29000 Mascara, Algeria;1. Dipartimento di Scienze Biologiche, Geologiche e Ambientali, Università di Catania, Corso Italia 57, I-95129, Catania, Italy;2. Ivančická 58, Prague 9, Letňany, 19900, Czech Republic;3. National Museum Palaeontological Department, Natural History Museum, National Museum, Cirkusová 1740, Praha 9, Horní Počernice, Czech Republic;4. Dipartimento di Scienze dell’Ambiente e della Terra, Università di Milano-Bicocca, Piazza della Scienza 4, Milano, 20126, Italy;5. Dipartimento di Scienze della Terra, Università di Pisa, via S. Maria 53, Pisa, 56126, Italy;6. Scuola di Scienze e Tecnologie, Università di Camerino, Camerino, Italy;7. Departamento de Paleontología de Vertebrados, Museo de Historia Natural, Universidad Nacional Mayor de San Marcos, Lima 1, Peru;1. Institute of Geology of the Czech Academy of Sciences, v. v. i., Departement of Paleobiology and Paleoecology, Rozvojová 269, 165 00 Prague 6 – Lysolaje, Czech Republic;2. Institute of Geology and Palaeontology, Charles University, Albertov 6, 128 43 Prague 2, Czech Republic;3. Ivančická 581, 19900 Prague 9 – Letňany, Czech Republic;4. Palaeontological Department, Natural History Museum, National Museum, Václavské náměstí 68, 115 79 Prague 1, Czech Republic;5. Lindenstrasse 53, D-72348 Rosenfeld, Germany;6. Musée Vert, Muséum d''histoire naturelle du Mans - 204, Avenue Jean Jaurès, 72100 Le Mans, France;7. Department of Geological Sciences, Faculty of Sciences, Masaryk University, Kotlářská 267/2, 611 37 Brno, Czech Republic;1. Geology and Geophysics Department, College of Science, King Saud University, Saudi Arabia;2. Geology Department, Faculty of Science, Zagazig University, Egypt;3. Instituto Patagónico de Geología y Paleontología (CONICET–CENPAT), Boulevard Brown 2915, Puerto Madryn, Chubut, Argentina |
| |
| Abstract: | Silicified fossils collected in ploughed fields at Gavrus (Calvados, France), mainly mollusc shells, are Bajocian in age, and come from the Oolithe ferrugineuse de Bayeux Formation. The entire formation is highly condensed and most fossils are reworked. Their silicification allowed treatment with dilute hydrochloric acid. This treatment brought to light numerous encrusting sclerobionts: Porifera (3 taxa), Bryozoa (n), Polychaeta (9), Brachiopoda (n), Bivalvia (5). The borings and bioerosional traces are described using the “categories of architectural design” as defined by Buatois et al. (2017). Among the 28 ichnotaxa described (corresponding to an ichnodisparity of 14), Planavolites wisshaki isp. nov., Kleithrichnus belemnophilus igen. nov., isp. nov. and Foggara foggara igen. nov., isp. nov. are new. Some Gastrochaenolites dijugus Kelly and Bromley, 1984 borings accommodate the shell of the presumed borer Lithophaga fabella J.-A. Eudes-Deslongchamps, 1838. A group of Nododendrina europaea (Fischer, 1875) on a belemnite rostrum provides a good instance of an ichnogenetic series. Encrusting sclerobionts and macroscopic boring and bioerosional trace-makers are dominantly suspension feeders. The ichnofacies is a peculiar Entobia-ichnofacies, found in deeper, lower-energy environments than the “classical” coastal Entobia-ichnofacies, on deep shell-grounds far from the coast, in the deep euphotic zone. |
| |
| Keywords: | Trace fossils Sclerobionts Bioerosion Polychaete tubes Silicification Bajocian Normandy Traces fossiles Sclérobionte Bioérosion Tubes de polychètes Silice Bajocien Normandie |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
