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Higher IV Terrace Deposits

• Coherent formation
• middle Pleistocene

• Sedimentary facies: Terrestrial
• Lithofacies (Top, Minor): Sands, Silt
• Lithofacies: Gravels, Sands

• Thickness: ca. 5 - 10 m or thicker
• Upper limit: Loam
• Lower limit: Unconformity (Shimizusawa Formation)

• Distribution: Kariyata river - Ikarashi river, Sanjo city, Niigata pref.; Araya, Gosen city, Niigata pref.

• Kudo et al. (2011) Geology of the Kamo District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 162p. (in Japanese with English abstract 4p.)
• Kobayashi et al. (2002) Geology of the Sanjo District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 98p. (in Japanese with English abstract 4p.)