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*Yoshihiro Sawada
Department of Geoscience, Faculty of Science and Engineering, Shimane University
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Toshiaki Irizuki
Department of Geoscience, Faculty of Science and Engineering, Shimane University
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Tetsuya Sakai
Department of Geoscience, Faculty of Science and Engineering, Shimane University
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Masaki Ozaki
Geological Survey of Japan, AIST
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Takashi Matsubara
Museum of Nature and Human Act., Hyogo