Microvertebrates from the Wadhurst Clay Formation (Lower Cretaceous) of Ashdown Brickworks,East Sussex,UK |
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Authors: | Pernelle Turmine-Juhel Richard Wilks David Brockhurst Peter A Austen Christopher J Duffin Michael J Benton |
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Institution: | 1. School of Earth Sciences, University of Bristol, Wills Memorial Building, Bristol, BS8 1RJ, UK;2. Géosciences, UMR 6118, Université Rennes-1, 263, Avenue du Général-Leclerc, 35000, Rennes, France;3. 8 Crowmere Avenue, Bexhill-on-Sea, East Sussex, TN40 2BA, UK;4. 3 Bromley Road, Seaford, East Sussex, BN25 3ES, UK;5. 146 Church Hill Road, Sutton, Surrey, SM3 8NF, UK;6. Earth Sciences Department, The Natural History Museum, Cromwell Road, London, SW7 5BD, UK |
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Abstract: | Ashdown Brickworks, near Bexhill, East Sussex, has produced a large number of vertebrate fossils from the Wadhurst Clay Formation, part of the Wealden Supergroup (Hastings Group; Valanginian; Lower Cretaceous). Here we describe the microvertebrate fauna of the ‘conglomerate bed’, representing a rich sample of taxa. While most of the recovered teeth and bones are abraded, some heavily, most can be identified to species level. The taxa include four species of hybodont sharks (Egertonodus basanus, Planohybodus ensis, Polyacrodus parvidens, P. brevicostatus), three taxa of bony fishes (an unidentified Lepidotes-like semionotiform, the pycnodontiform Ocloedus, and an albuliform), three taxa of crocodyliforms (the goniopholid Hulkepholis, a bernissartiid, and the atoposaurid Theriosuchus), and the theropod dinosaurs Baryonyx and an allosauroid. Sediments of the Wadhurst Clay Formation as a whole indicate freshwater to very slightly brackish-water environments of deposition, and the mainly aquatic time-averaged mixture of fishes and tetrapods recovered from the ‘conglomerate bed’, together with isolated terrestrial species, confirms this interpretation. |
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Keywords: | Corresponding author Wadhurst Clay Formation Wealden Cretaceous Valanginian Hybodontidae Semionotiformes Crocodyliformes Palaeoenvironment Brackish environments |
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