Affiliation: | a Department of Geography, University of Cambridge, Cambridge, UKb Department of Earth Sciences, Sedgwick Museum, University of Cambridge, Cambridge, UKc Department of Geology, University of Leicester, Leicester, UKd Department of Earth Sciences, The Open University, Milton Keynes, UKe Swedish Museum of Natural History, Stockholm, Swedenf School of Earth Sciences, Cardiff University, Cardiff, UKg School of Environmental Science, Greenwich University, UKh Department of Palaeontology, Natural History Museum, London, UKi Kronos Consultants, St. Albans, Herts, UKj Department of Paleontology, Natural History Museum, London, UKk Britsh Geological Survey, keyworth, Nottingham, UKl Department of Geological Sciences, University College London, London, UKm British Geological Survey, Edinburgh, UK |