3:30 PM - 4:45 PM
Kazuaki Watanabe1, *Futoshi Nanayama1, Kiyoyuki Shigeno2, Takeshi Hasegawa3, Kazuto Ishiwata4, Tetsuya Ono5 (1.Geological Survey of Japan, AIST, 2.Meiji Consultant Co., Ltd., 3.Ibaraki Univ., 4.Betsukai Museum, 5.Po-gawa Historic Site and Natural Park, Shibetsu Town)