1. Department of Earth Science; University of Bergen; Bergen Norway
2. Geowissenschaftliches Zentrum der Georg-August Universität; Göttingen Germany
3. Department of Geosciences; University of Oslo; Oslo Norway
4. Department of Arctic Geology; University Centre in Svalbard; Svalbard Norway
5. Now at Department of Geosciences; UiT The Arctic University of Norway; Tromsø Norway