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Kerama Formation
- Type locality: Kerama islands, Okinawa prefecture
- Accretionary complex
- Correlation: Nago Formation
- Sedimentary facies: Marine
- Lithofacies (Slate member, Main): Mudstone
- Lithofacies (Slate member, Minor): Interbedded sandstone and mudstone
- Lithofacies (Sandstone member): Sandstone-dominant interbedded sandstone and mudstone
- Lithofacies (Greenstone member): Basaltic pillow lava, Hyaloclastite, Sill
- Kerama Formation
- [ Upper ]
- /--/--/--/--/-
- Slate member
- --------------
- Sandstone member
- --------------
- Greenstone member
- /--/--/--/--/-
- [ Lower ]
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Eastern Nago city, Okinawa pref.; Nago castle park, Nago city, Okinawa pref.
- Miyagi et al. (2013) Jour. Geol. Soc. Japan, vol.119, no.10, pp.665-678 DOI