*Taiga Tomaru¹, Reishi Takashima², Yuji Orihashi³, Toshiro Yamanaka⁴, Hiroshi Nishi⁵, Azumi Kuroyanagi², Yoshihiro Asahara⁶ (1.Department of Earth Science, Graduate School of Science, Tohoku University, 2.The Center for Academic Resources and Archives Tohoku University Museum , 3.Global Environment and Disaster Prevention Sciences, Graduate School of Science and Technology, Hirosaki University, 4. School of Marine Resource and Environment, Tokyo University of Marine Science and Technology, 5.Institute of Dinosaur Research , Fukui Prefectural University, 6.Department of Earth and Environmental Sciences, Graduate School of Environmental Studies, Nagoya University)

*Reishi Takashima¹, Keiichi Hayashi², Junichiro Kuroda⁴, Hayu Ota⁴, Hiroyuki Hoshi³, Yuji Orihashi⁵, Hiroshi Nishi⁶, Toshiro Yamanaka⁸, Ken Sawada⁷, Kazuo Hayashi⁷, Masashi A. Ikeda⁷, Kohei Hosogaya¹, Yoshihiro Asahara⁹ (1.Tohoku University, 2.Hokkaido Research Organization, 3.Aichi University of Education, 4.The University of Tokyo, 5.Hirosaki University, 6.Fukui Prefectural University, 7.Hokkaido University, 8.Tokyo University of Marine Science and Tehnology, 9.Nagoya University)

*Hayu Ota¹, Junichiro Kuroda¹, Akira Ishikawa², Katsuhiko Suzuki³, Reishi Takashima⁴ (1.Department of Ocean Floor Geoscience, Atmosphere and Ocean Research Institute, the University of Tokyo, 2.Department of Earth and Planetary Sciences, Tokyo institute of Technology, 3.Submarine Resources Research Center, Japan Agency for Marine-Earth Science and Technology, 4.Tohoku University Museum, Tohoku University)

*Keiichi Hayashi¹, Hiroshi Nishi², Reishi Takashima³, Toshiro Yamanaka⁴ (1.Hokkaido Research Organization, 2.Fukui Prefecture University, 3.Tohoku University, 4.Tokyo University of Marine Science and Technology)

*Issei Murakami¹, Azumi Kuroyanagi¹, Reishi Takashima¹, Hiroshi Nishi² (1.Tohoku University, 2.Fukui Prefectural University)

*Takumi Otsubo¹, Reishi Takashima², Azumi Kuroyanagi², Toshiro Yamanaka³, Yuji Orihashi⁴, Yoshihiro Asahara⁵ (1.Tohoku University, 2.The Tohoku University Museum, 3.Tokyo University of Marine Science and Technology, 4.Hirosaki University, 5.Nagoya University)

*Hiroyuki Hoshi¹, Ryoki Takahashi¹, Reishi Takashima², Keiichi Hayashi³ (1.Aichi University of Education, 2.Tohoku University, 3.Hokkaido Research Organization)

*Hiroyuki Hoshi¹, Yota Kitano¹, Ichiha Mita¹, Reishi Takashima², Keiichi Hayashi³ (1.Aichi University of Education, 2.Tohoku University, 3.Hokkaido Research Organization)