*Hidekazu Yoshida¹, Koshi Yamamoto¹, Hitoshi Hasegawa², Nagayoshi Katsuta³, Sin-iti Sirono¹, Ippei Maruyama¹, Masayo Minami¹, Yoshihiro Asahara¹, Yasushi Yamaguchi¹, Shoji Nishimoto⁴, Niiden Ichinnorov⁵, Richard Metcalfe⁶ (1.Nagoya University, 2.Kochi University, 3.Gifu University, 4.Nagoya City Science Center, 5.Institute of Paleontology and Geology, Mongolian Academy of Science, Mongolia, 6.Quintessa Limited, UK)

*Keiji Horikawa¹, Boo-Keun Khim², Yoshihiro Asahara³ (1.Graduate School of Engineer and Science, University of Toyama, 2.Department of Oceanography, Pusan National University, 3.Graduate School of Environmental Studies, Nagoya University,)