*yuga kondo¹, Yumiko Watanabe (1.Kyoto University )

*Seiko Yamasaki¹, Teruki Oikawa¹, Daniel P. Miggins², Anthony A.P. Koppers² (1.Geological Survey of Japan, Advanced Industrial Science and Technology, 2.Oregon State University)

Giovanni Luca Cardello¹, Andrew Todd², *Horst Zwingmann³ (1.University of Sassari, Italy, 2.CSIRO Energy, Kensington, Australia, 3.Kyoto University)

*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)

*Kohei Hosogaya¹, Reishi Takashima², Junichiro Kuroda³, Hironao Matsumoto⁴, Toshiro Yamanaka⁵, Hiroshi Nishi⁶, Satoshi Oka¹ (1.Department of Earth Science, Graduate School of Science, Tohoku University, 2.Tohoku University Museum, Tohoku University, 3.Department of Ocean Floor Geoscience, Atmosphere and Ocean Research Institute, the University of Tokyo, 4.Institute of Life and Evironmental Sciecnces, University of Tsukuba, 5.Tokyo University of Marine Science and Technology, 6.Fukui Prefectural University)

*Kengo Kataoka¹, Kazuo Kawasaki¹ (1.University of Toyama)