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Higher 1 Terrace Deposit

• Coherent formation
• middle Pleistocene

• Lithofacies: Gravels
• Lithofacies (Minor): Pyroclastic flow deposit

• Thickness (Pyroclastic flow deposit): 3 m or thicker
• Upper limit: Unconformity (Noroshidai Loam)

• Distribution: Sekikawa river, Myoko city, Niigata pref.

• Yanagisawa et al. (2000) Geology of the Iiyama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 144p. (in Japanese with English abstract 6p.)