12:00 PM - 12:15 PM
*Shoichi Kiyokawa1, Takashi Ito2, Minoru Ikehara3, Kosei E. Yamaguchi5, Tetsuji Onoue4, Kenji Horie6, Satoshi Yoshimaru1, Tsubasa Miki1, Tetteh M George7, Frank K Nyame8 (1.Department of Earth and Planetary Sciences Faculty of sciences, Kyuushu University, 2.Dept. Education, Ibaraki Univ., 3.Kochi Univ., 4.Kumamoto Univ., 5.Toho Univ., 6.National Polar Inst., 7.University of Mines and Technology, Tarkwa, 8.University of Ghana, department of Geology)