*Shin Toyoda¹, Reo Kinugasa², Miyu Kakumoto², Jun-ichiro Ishibashi³, Tatsuo Nozaki^4,5, Hisao Yoshinaga⁶, Yuto Iinuma⁶, Ryo Okumura⁶ (1.Institute of Paleontology and Geochronology, Okayama University of Science, 2.Faculty of Science, Okayama University of Science, 3.Kobe Ocean-bottom Exploration Center, Kobe University, 4.Faculty of Science and Engineering, Waseda University, 5.School of Engineering, University of Tokyo, 6.Insitute of Integrated Radiation and Nuclear Science, Kyoto University)

*Jun-ichiro Ishibashi^1,2, Shin Toyoda³, Yushi Itatani², Yusuke Okazaki² (1.Kobe Ocean-Bottom Exploration Center, Kobe University, 2.Faculty of Science, Kyushu University, 3.Okayama University of Science)

*Karen Okada¹, Shin Toyoda¹, Kana Nagashima² (1.Okayama University of Science, 2.Japan Agency for Marine-Earth Science and Technology)

*Kana Nagashima¹, Hitoshi Hasegawa², Karen Okada³, Shin Toyoda³ (1.Japan Agency for Marine-Earth Science and Technology, 2.Kochi University, 3.Okayama University of Science)