*Shuuhei Tsukui1, Kenta Kobayashi1 (1.Department of Geology, Faculty of Science, Niigata University)
convener:Yukitoshi Fukahata(Disaster Prevention Research Institute, Kyoto University), Toru Takeshita(Department of Natural History Sciences, Graduate School of Science, Hokkaido University), Hikaru Iwamori(Geochemical Evolution Research Program, Japan Agency for Marine-Earth Science and Technology), Chairperson:Toru Takeshita, Kenta Kobayashi