Fri. May 2, 2014 9:30 AM - 9:45 AM
*Norihiro HOSODA1, Takahiro WATANABE1, Noriyoshi TSUCHIYA1, Shin-ichi YAMASAKI1, Toshio NAKAMURA2, Fumiko NARA1, Atsushi OKAMOTO1, Nobuo HIRANO1 (1.Graduate School of Environmental Science, Tohoku University, 2.Center for Chronological Research, Nagoya University)