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Yukito Kurihara
Institute of Geoscience, University of Tsukuba
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Hiroaki Ugai
Institute of Geoscience, University of Tsukuba
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Rei Nakashima
JSPS Research Fellow, Institute of Geoscience, GSJ, AIST
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Kazuo Okamoto
Former Hiroshima Univ.
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Chisayo Matsue
Geological Museum, GSJ, AIST
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Yukio Yanagisawa
Institute of Geoscience, GSJ, AIST