4:15 PM - 4:30 PM
*hiromi takeda1, Yuhji Yamamoto2, Masahiko Sato3, Hiroshi Kawabata4 (1.Graduate school of Integrated Arts and Sciences, Kochi University, 2.Center for Advanced Marine Core Research, Kochi University, 3.Geological Survey of Japan, AIST, 4.Faculty of Science, Kochi University)