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Shimizusawa Formation (Saito, 1980) Collaborative Research Group on the Geology of Kamo, 1990

• Type locality: Hanyuda elementary school, Tagami city, Minamikanbara county, Niigata prefecture
• Coherent formation
• Pleistocene
• Contemporaneous heterotopic facies: Hirote Formation?
• Correlation: Oyama Formation

• Sedimentary facies (Upper): Fluvial
• Sedimentary facies (Middle): Shallow marine
• Sedimentary facies (Lower): Fluvial
• Lithofacies (Upper): Silt-dominant interbedded sands and silt
• Lithofacies (Middle): Sands, Silt
• Lithofacies (Lower): Sands, Gravels
• Sedimentary structures (Upper): Trough cross-stratification
• Sedimentary structures (Middle): Ripple foliation, Parallel foliation
• Sedimentary structures (Lower): Trough cross-stratification

• Thickness (Upper): 5 - 9 m
• Thickness (Middle): 3 - 10 m
• Thickness (Lower): 0 - 6 m
• Upper limit: Unconformity (Higher IV Terrace Deposit)
• Lower limit: Unconformity (Akatani Formation)

------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

• Distribution: Hanyuda elementary school, Tagami city, Minamikanbara county, Niigata pref.; Kamo city, Niigata pref.; Higashiosaki, Sanjo city, Niigata pref.
• Fossils (Upper, Plants): Styrax japonica
• Fossils (Middle): Trace fossils

• Kudo et al. (2011) Geology of the Kamo District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 162p. (in Japanese with English abstract 4p.)