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Akatani Formation (Collaborative Research Group on the Geology of Kamo, 1990) Kudo et al., 2011

Invalid synonym: Jingamine Formation

• Type locality: Nagasaka - Akatani, Kamo city, Niigata prefecture
• Coherent formation
• Pleistocene (1 Ma or later)

• Sedimentary facies: Marine, Brackish
• Sedimentary facies: Estuary
• Sedimentary facies (Minor): Fluvial
• Lithofacies: Mud, Sandy mud, Interbedded mud and sands
• Lithofacies (Minor): Gravels
• Sedimentary structures: Cross stratificaiton, Imbrication

• Thickness: ca. 100 m
• Upper limit: Unconformity (Shimizusawa Formation, Middle I Terrace Deposit)
• Lower limit: Unconformity (Honai Formation)

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

• Distribution: Nagasaka - Akatani, Kamo city, Niigata pref.; Yanagisawa - Higashiosaki, Sanjo city, Niigata pref.
• Fossils: Plants, Diatoms, 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.)