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Kourijima Formation
- Type locality: Kouri island, Okinawa prefecture
- Coherent formation
- Coral reef complexes
- Pleistocene, (1.71 - 0.45 Ma, Calcareous nannofossils)
- Correlation: Naha Formation
- Sedimentary facies: Marine
- Upper limit: Unconformity
- Lower limit: Unconformity
- Kourijima Formation
- [ Upper ]
- ~~~~~~~~~~~~~~
- Unit 4
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- Unit 3
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- Unit 2
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- Unit 1
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- [ Lower ]
- Ryukyu Group (Kouri island, Okinawa pref.)
- [ Upper ]
- ~~~~~~~~~~~~~~
- Kourijima Formation
- ~~~~~~~~~~~~~~
- [ Lower ]
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Kouri island, Okinawa pref.
- Sagae et al. (2012) Jour. Geol. Soc. Japan, vol.118, no.2, pp.117-136 DOI