This edition has been revised by Dr James MacDonald and Dr Christopher Burton. Dr MacDonald is an Honorary Research Fellow at the Univerisity of Glasgow, a member of the Council of the Mineralogical Society, and a past president of the Geological Society of Glasgow. Dr Burton is Head of the Division of Earth Sciences, University of Glasgow.
Dorothy Farris Lapidus is a lecturer and writer from New York. The Consultant Editor, Dr Isobel Winstanley, tutors in Earth Sciences at the Open University.