The first discovery of crinoids and cephalopod hooklets in the British Triassic |
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| Institution: | 1. British Geological Survey, Keyworth, Nottingham NG12 5GG, UK;2. Earth Sciences and Geography, Keele University, Staffordshire ST5 5BG, UK;1. CAM Centro di Ateneo per i Musei, Università degli Studi di Padova, Via Orto Botanico 15, 35123 Padova, Italy;2. Dipartimento di Geoscienze, Università degli Studi di Padova, Via Gradenigo 6, 35131 Padova, Italy;3. Museo di Scienze Naturali dell''Alto Adige, Via Bottai 1, 39100 Bolzano, Italy;4. MUSE Museo delle Scienze, Corso del Lavoro e della Scienza, 3, 38123 Trento, Italy;5. School of Earth Sciences, University of Bristol, Bristol BS8 1RJ, UK;6. Steinmann Institut für Geologie, Mineralogie und Paläontologie, Universität Bonn, Nussallee 8, 53115 Bonn, Germany;7. Geologischer Dienst Nordrhein-Westfalen, De-Greiff-Straße 195, 47803 Krefeld, Germany;8. Institut für Geologie, Universität Innsbruck, Innrain 52, A-6020 Innsbruck, Austria;9. Department für Geo- und Umweltwissenschaften, Paläontologie und Geobiologie, Ludwig-Maximilians-Universität, and Bayerische Staatssammlung für Paläontologie und Geologie, Richard-Wagner-Straße 10, 80333 München, Germany;1. Faculty of Geology, University of Oviedo, C/ Jesus Arias de Velasco s/n, 33005 Oviedo, Spain;2. Department of Apply Geosciences, CCTH - Science and Technology Research Centre, University of Huelva, Av. Fuerzas Armadas SN, 21071 Huelva, Spain;3. Department of Earth Sciences, Faculty of Experimental Sciences, Campus de El Carmen, University of Huelva, Avda. 3 de Marzo, s/n, 21071 Huelva, Spain |
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| Abstract: | The Late Triassic Rhaetian stage is perhaps best known in south-west Britain for the bone beds of the Westbury Formation, but there are other fossil-rich horizons within this and the underlying Blue Anchor Formation. Samples from a borehole drilled at the Filton West Chord, and collected from exposures near Bristol Parkway railway station, have yielded significant fossil material from both of these formations. The assemblage recovered from the Blue Anchor Formation is similar to those from the lower Westbury Formation, yielding roughly equal proportions of chondrichthyans and osteichthyans. Assemblages recovered from the Westbury Formation are typical of those from the upper Westbury Formation, in being dominated by osteichthyans. The borehole samples have produced the first recorded evidence of crinoids in the British Triassic, and the first evidence of coleoid cephalopods, in the form of grasping hooklets, from the Rhaetian, and indeed the first from the British Triassic. |
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| Keywords: | Cephalopod hooklets Crinoids Chondrichthyes Actinopterygii Bristol Rhaetian Rhaetian bone bed Westbury Formation Blue Anchor Formation |
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