*Shunichi Kinoshita¹, Azumi Kuroyanagi², Hiroshi Nishi², Osamu Sasaki², Kazuhiko Fujita³, Atsushi Suzuki⁴, Hodaka Kawahata⁵ (1.Tohoku University, Graduate School of Science, 2.The Tohoku University Museum, 3.University of the Ryukyus, 4.Geological Survey of Japan National Institute of Advanced Industrial Science and Technology, 5.the University of Tokyo)