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Sasagamine Formation (Takada Plain Collaborative Research Group, 1966)

• Type locality: Not indicated
• Coherent formation
• late Pleistocene (24,550 yBP, ¹⁴C)
• Correlation: Furuma Formation, Nojiriko Formation, Mure Formation

• Sedimentary facies: Lacustrine
• Sedimentary facies: Debris flow deposit
• Lithofacies: Clay, Sands, Breccia
• Lithofacies (Minor): Peat-rich mud
• Sedimentary structures: Imbrication

• Thickness: ca. a few dozen m
• Lower limit: Unconformity (Tanogashira Formation, Hikage Formation)

• Distribution: Sasagamine farm, Sekikawa, Myoko city, Niigata pref.; Seki river - Niguro river, Nagano city, Nagano pref.
• Tephra: AT, Kannoki Scoria

• 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.)