11:15 AM - 11:30 AM
*Masaaki Owada1, Tohru Sakiyama2, Yasuhito Osanai3, Atsushi Kamei4, Nobuhiko Nakano3, Tatsuro Adachi3, Kenji Horie5, Tomokazu Hokada5 (1.Graduate School of Science and Engineering for Innovation, Yamaguchi University, 2.Institute of Geo-history, Japan Geochronology Network NPO, 3.Kyushu University, 4.Shimane University, 5.National Institute of Polar Research)