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Shiokura Gravel Harayama et al., 2009

• Coherent formation
• early Pleistocene

• Sedimentary facies (Minor): Debris flow deposit
• Lithofacies: Gravels, Silt

• Thickness: 20 m
• Lower limit: Unconformity (Uchimura Formation?)

• Distribution: Lake Shiokuraike, Okada, Matsumoto city, Nagano pref.

• Harayama et al. (2009) Geology of the Matsumoto District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 63p. (in Japanese with English abstract 3p.)