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Lower I Terrace Deposit

• Coherent formation
• Pleistocene (30 - 12 ka)

• Lithofacies: Boulder gravels
• Lithofacies (Minor): Sands, Mud

• Thickness: 20 m or thicker

• Distribution: Tamagawa river, Chojahara - Izumioka, Oguni city, Nishiokitama county, Yamagata pref.

• Takahashi et al. (1996) Geology of the Iidesan District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 52p. (in Japanese with English abstract 3p.)