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Zakogawa Formation

• Coherent formation
• Miocene

• Sedimentary facies: Marine

• Upper limit: Unconformity (Takai Volcanic Rocks, Akiyamago Formation)

• Distribution: Sakae city, Shimominochi county, Nagano pref.

• Igarashi et al. (2007) Jour. Geol. Soc. Japan, vol.113, no.11, pp.565-584 DOI