1. Department of Geosciences, University of Tromsø (UiT)–The Arctic University of Norway, N-9037 Tromsø, Norway
2. Department of Earth Science, University of California, Santa Barbara, California 93106, USA
3. Central European Petroleum Company, Ltd., Calgary, AB T2P 3T3, Canada
4. Department of Geosciences, University of Oslo, 0371 Oslo, Norway