*Wataru Tanikawa^1,2, Tetsuya Yamamoto¹, Riko Nakamura², Osamu Tadai⁴, Takuroh Noguchi², Ryota Nakajima¹, Asuka Yamaguchi³, Yuhji Yamamoto² (1.Japan Agency for Marine-Earth Science and Technology, 2.Kochi University, 3.The University of Tokyo, 4.Marine Works Japan Ltd.)

*Wataru Tanikawa^1,2,5, Tetsuya Yamamoto¹, Shintaro Yamasaki³, Jun Kimura⁵, Hisashi Nakagawa⁴, Masao Yoshida⁶, Yuhji Yamamoto² (1.Japan Agency for Marine-Earth Science and Technology, 2.Kochi University, 3.Kyoto University, 4.Toyohashi City Museum Art and History, 5.Tokai University, 6.Kitashiobara Village)

*Takehiro Hirose¹, Wataru Tanikawa¹, Yohei Hamada¹, Hanaya Okuda¹ (1.Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology)

*Hanaya Okuda¹, Wataru Tanikawa¹, Yohei Hamada¹, Keishi Okazaki^2,1, John D Bedford³, Takehiro Hirose¹ (1.Kochi Institute for Core Sample Research, Japan Agency for Marine-Earth Science and Technology, 2.Earth and Planetary Systems Science Program, Hiroshima University, 3.Department of Earth, Ocean and Ecological Sciences, University of Liverpool)