4:30 PM - 4:45 PM
*Tetsuro Hirono1, Tsuyoshi Ishikawa2, Ayana Shimamoro3 (1.Department of Geosciences, Graduate School of Science, Osaka Metropolitan University, 2.Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth and Technology (JAMSTEC), 3.Department of Earth and Space Science, Graduate School of Science, Osaka University)