4:30 PM - 4:45 PM
*Takuya SAGAWA1, Masao UCHIDA2, Masafumi MURAYAMA3, Ryuji TADA4 (1.Department of Earth and Planetary Sciences, Faculty of Sciences, Kyushu University, 2.National Institute for Environmental Studies, 3.Center for Advanced Marine Core Research,, Kochi University, 4.Department of Earth and Planetary Science, Graduate School of Science, The Univeristy of Tokyo)