11:15 AM - 11:30 AM
*Naoki KATO1, Tetsuro HIRONO1, Tsuyoshi ISHIKAWA2, Jun KAMEDA3, Tomoyuki OHTANI4 (1.Department of Earth and Space Science, Graduate School of Science, Osaka University, 2.Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology, 3.Department of Natural History Sciences, Graduate School of Science, Hokkaido University, 4.Department of Civil Engineering, Gifu University)