9:30 AM - 9:45 AM
*Adam David Sproson1, Toshihiro Yoshimura1, Shigeyuki Wakaki2, Tsuyoshi Ishikawa3, Naohiko Ohkouchi1 (1.Biogeochemistry Research Center, Japan Agency for Marine-Earth Science and Technology, 2-15 Natsushima, Yokosuka, Kanagawa 237-0061, Japan, 2.National Museum of Japanese History, 117 Jonai-cho, Sakura City, Chiba Prefecture 285-8502, Japan, 3.Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology 200 Monobe Otsu, Nankoku City, Kochi 783-8502, Japan)