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“cˆä Šp‘MÎ-Ž‡‘h‹PÎ ŒyÎŽ¿‰ÎŽRŠD (VŠƒ•½–ì“Œ‰ ’c‘ÌŒ¤‹†ƒOƒ‹[ƒv, 1990) ¬—Ñ‚Ù‚©, 1991

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Thp Tephra (Collaborative Research Group for Eastern Marginal Hills of Niigata Plain, 1990) Kobayashi et al., 1991

ѻΐ: Thp

•Ê–¼ (–³Œø): Ho-Hyƒpƒ~ƒX