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Ohama Formation

• Coherent formation
• Coral reef complex
• Pleistocene (119.9 - 118.5 ka, Th-U)

• Sedimentary facies: Marine
• Lithofacies: Coral framestone, Detrital grainstone, Detrital packstone, Floatstone

• Lower limit: Angular unconformity (Tomuru Formation)

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

• Distribution: Ibaruma - Arakawa, Ishigaki city, Okinawa island
• Fossils (Corals): Acropora spp., Acropora monticulosa, Acropora palifera, Goniastrea retiformis, Porites spp., Montipora digitata

• Yamada et al. (2007) Jour. Geol. Soc. Japan, vol.113, no.1, pp.19-22 DOI