Junichi Fukuda, Kobe University, Research Center for Inland Seas, Department of Planetology, Kobe, Japan, Hugues Raimbourg, ISTO Institut des Sciences de la Terre d'Orléans, Orléans Cedex 2, France, Ichiko Shimizu, Kyoto University, Division of Earth and Planetary Sciences, Sakyo-ku, Japan, Kai Neufeld, University of Tromsø, Department of Geosciences, Tromsø, Norway and Holger Stunitz, University of Tromsø, Department of Geology, Tromsø, Norway