*Jun-ichiro Ishibashi^1,2, Shuhei Totsuka², Akihi Tsutsumi², Naru Tsukamoto², Yusuke Kira², Kazuhiko Shimada¹, Toru Yamasaki³, Ken Ikehara³, Toshiro Nagase⁴, Yutaro Takaya^5,9, Kei Ikehata⁶, Takashi Goto⁷, Chitaro Gouzu⁷, Ryuichi Shinjo⁸, Hideaki Machiyama⁹, Koichi Iijima⁹, Hirofumi Yamamoto⁹, Hidenori Kumagai⁹ (1.Department of Earth and Planetary Sciences, Kyushu University, 2.Graduate School of Science, Kyushu University, 3.National Institute of Advanced Industrial Science and Technology, 4.Tohoku University Museum, 5.School of Creative Science and Enginerring, Waseda University, 6.Faculty of Life and Environmental Sciences, University of Tsukuba, 7.Hiruzen Institute for Geology and Chronology, 8.Faculty of Science, University of the Ryukyus, 9.Japan Agency for Marine-Earth Science and Technology)

*Jun-ichiro Ishibashi^1,2, Shuhei Totsuka², Akihi Tsutsumi², Naru Tsukamoto², Yusuke Kira², Kazuhiko Shimada¹, Toru Yamasaki³, Ken Ikehara³, Toshiro Nagase⁴, Yutaro Takaya^5,9, Kei Ikehata⁶, Takashi Goto⁷, Chitaro Gouzu⁷, Ryuichi Shinjo⁸, Hideaki Machiyama⁹, Koichi Iijima⁹, Hirofumi Yamamoto⁹, Hidenori Kumagai⁹ (1.Department of Earth and Planetary Sciences, Kyushu University, 2.Graduate School of Science, Kyushu University, 3.National Institute of Advanced Industrial Science and Technology, 4.Tohoku University Museum, 5.School of Creative Science and Enginerring, Waseda University, 6.Faculty of Life and Environmental Sciences, University of Tsukuba, 7.Hiruzen Institute for Geology and Chronology, 8.Faculty of Science, University of the Ryukyus, 9.Japan Agency for Marine-Earth Science and Technology)