1. Palaeoscience Research Centre, School of Environmental and Rural Science, University of New England, Armidale, NSW 2351, Australia
2. School of Biological Sciences & Environment Institute, University of Adelaide, Adelaide, SA 5005, Australia
3. Earth Sciences Section, South Australian Museum, North Terrace, Adelaide, SA 5000, Australia
4. School of Natural and Built Environments, University of South Australia, Mawson Lakes, SA 5095, Australia
5. Department of Earth Sciences, The Natural History Museum, Cromwell Road, London SW7 5BD, UK