1. Department of Arctic Geology, The University Centre in Svalbard, P.O. Box 156, N-9171 Longyearbyen, Svalbard, Norway
2. Department of Geosciences, University of Oslo, Geologibygningen, Sem Sælands vei 1, Oslo 0371, Norway
3. Swarbrick GeoPressure Consultancy and Durham University, UK