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Middle Terrace Deposit

• Coherent formation
• late Pleistocene, Last interglacial period

• Lithofacies: Gravels
• Lithofacies (Minor): Sands, Peat

• Thickness: 2 - 8 m

• Distribution: Koyoshi river, Higashiayukawa, Yurihonjo city, Akita pref.; Sasako river, Kamikawauchi, Chokai town, Yurihonjo city, Akita pref.

• Ozawa et al. (1988) Geology of the Yashima District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 87p. (in Japanese with English abstract 5p.)