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Department of Earth Sciences, Oxford University, Parks Road, Oxford OX1 3PR, UK
M. D. Welch
Affiliation:
Department of Mineralogy, The Natural History Museum, Cromwell Road, London SW7 5BD, UK
K. Wright
Affiliation:
Royal Institution of Great Britain, Albermarle Street, London W1S 4BS, UKDepartment of Geological Sciences, University College London, Gower Street, London WC1E 6BT, UK
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