5:15 PM - 6:30 PM
*Tsuyoshi Toyoshima1, Yasuhito Osanai2, Masaaki Owada3, Toshiaki Tsunogae4, Tomokazu Hokada5, Norio Shigematsu6 (1.Department of Geology, Faculty of Science, Niigata University, 2.Division of Evolution of Earth Environments, Kyushu University, 3.Department of Earth Sciences, Yamaguchi University, 4.Faculty of Life and Environmental Sciences, 5.National Institute of Polar Research, 6.National Institute of Advanced Industrial Science and Technology)