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Shimizu Formation Yano and Murayama, 1976

Invalid synonym: Tochihara Formation, Machi Formation

• Type locality: Shigarami - Orihashi, Togakushi, Nagano city, Nagano prefecture
• Coherent formation
• middle - late Pleistocene
• Correlation: Middle Terrace Deposit

• Sedimentary facies: Lacustrine
• Lithofacies: Silt, Clay, Peat-bearing silt
• Lithofacies (Minor): Sands, Gravels
• Sedimentary structures (Silt): Parallel stratificaiton
• Sedimentary structures (Gravels): Cross stratification

• Thickness: 37 m
• Lower limit: Unconformity (Iizuna Pyroclastic Flow Deposit, Arakurayama Formation)

• Distribution: Shigarami - Orihashi - Machi - Shimizu - Sarumaru, Togakushi, Nagano city, Nagano pref.

• Nagamori et al. (2003) Geology of the Togakushi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 109p. (in Japanese with English abstract 3p.)