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Middle I Terrace Deposit

• Coherent formation
• Pleistocene (older than 31.9 ka, ¹⁴C)

• Sedimentary facies: Fluvial
• Lithofacies: Gravels
• Lithofacies (Minor): Sands, Mud

• Distribution: Shirakawa river - Takamine - Shimoyachi - Kamiyachi - Hirogawara, Iide city, Nishiokitama county, Yamagata pref.

• Yanagisawa and Yamamoto (1998) Geology of the Tamaniwa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 94p. (in Japanese with English abstract 4p.)