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Nyugawa Formation

• Coherent formation
• Holocene

• Sedimentary facies: Marine
• Sedimentary facies: Delta
• Lithofacies (Upper): Sands, Sandy gravels
• Lithofacies (Middle): Clay, Silt
• Lithofacies (Lower): Sands, Sandy gravels

• Thickness: 20 m or thinner
• Lower limit: Unconformity, partly abut (Shuso Formation)

• Distribution: Saijo plain, Ehime pref.
• Fossils (Middle): Shellfishes

• Kawamura and Nishiyama (2019) Jour. Geol. Soc. Japan, vol.125, no.1, pp.87-105 DOI