1. CASP, Madingley Rise, Madingley Road, Cambridge CB3 0UD, UK
2. Mott MacDonald Group Ltd., 22 Station Road, Cambridge CB1 2JD, UK
3. Department of Geology, School of Natural Sciences, Trinity College Dublin, Dublin 2, Ireland
4. Department of Geology and Geophysics, King’s College, University of Aberdeen, Aberdeen AB24 3UE, UK
5. Department of Earth Sciences, University of the Western Cape, P/Bag X17, Bellville 7530, South Africa
6. Rocktype, Magdalen Centre, Robert Robinson Avenue, Oxford OX4 4GA, UK
7. British Antarctic Survey, High Cross, Madingley Road, Cambridge CB3 0ET, UK
8. UCD School of Earth Sciences, University College Dublin, Belfield, Dublin 4, Ireland
9. Swedish Museum of Natural History, P.O. Box 50 007, SE-104 05 Stockholm, Sweden