*Evelien Boes¹、Osamu Fujiwara²、Yusuke Yokoyama⁷、Sabine Schmidt⁴、Svenja Riedesel³、Atsunori Nakamura²、Vanessa M.A. Heyvaert⁵、Helmut Brückner⁶、Marc De Batist¹ (1.Renard Centre of Marine Geology, Department of Geology, Ghent University, Belgium、2.Geological Survey of Japan, AIST, Japan、3.Department of Geography and Earth Sciences, Aberystwyth University, United Kingdom、4.EPOC, University of Bordeaux, France、5.Geological Survey of Belgium, Royal Belgian Institute of Natural Sciences, Belgium、6.Institute of Geography, University of Cologne, Germany、7.Atmosphere and Ocean Research Institute, University of Tokyo, Japan)