11:00 AM - 11:15 AM
*Takeshi Imayama1, Kazunori Arita2, Mayuko Fukuyama3, Yi Keewook4, Ryoichi Kawabata5 (1.Research Institute of Earth Science, Okayama University of Science, 2.Department of Natural History Sciences, Hokkaido University, 3.Graduate School of Engineering Science, Akita University, 4.Geochronology Team, Korea Basic Science Institute, 5.Faculty of Biosphere-Geosphere Science, Okayama University of Science)