Koehl, Jean-Baptiste, Centre for Earth Evolution and Dynamics, University of Oslo, Oslo, Norway; Department of Geosciences, UiT The Arctic University of Norway, Tromsø, Norway; Research Centre for Arctic Petroleum Exploration, UiT The Arctic University of Norway, Tromsø, Norway; and Centre for Arctic Gas Hydrate, Environment and Climate, UiT The Arctic University of Norway, Tromsø, Norway, Norway