*Taiga Tomaru¹, Reishi Takashima², Yuji Orihashi³, Toshiro Yamanaka⁴, Hisao Ando^5,6, Yoshihiro Asahara⁷, Azumi Kuroyanagi², Hiroshi Nishi⁶ (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.Department of Earth Science, Graduate School of Science and Engineering, Ibaraki University, 6.Department of Dinosaur Paleontology and Geology, Faculty of Dinosaur Paleontology, Fukui Prefectural University, 7.Department of Earth and Environmental Sciences, Graduate School of Environmental Studies, Nagoya University)

*Reishi Takashima¹, Takumi Otsubo¹, Taiga Tomaru¹, Masayuki Ehiro¹, Toshiro Yamanaka², Yuji Orihashi³, Yuki Asahara⁴, Azumi Kuroyanagi¹, Hiroshi Nishi⁵ (1.Tohoku University, 2.Tokyo University of Marine Science and Technology, 3.Hirosaki University, 4.Nagoya University, 5.Fukui Prefectural University)