[ Top ] [ Japanese ]

Unit 2a

• Type locality: Kitadaito island, Kitadaito city, Shimajiri county, Okinawa prefecture
• Coherent formation
• Oceanic island sediments
• Pleistocene

• Sedimentary facies: Marine
• Sedimentary facies: Reef core, Back-reef
• Lithofacies (Reef core): Framestone
• Lithofacies (Reef core, Minor): Rudstone, Bufflestone
• Lithofacies (Back-reef): Rudstone
• Lithofacies (Back-reef, Minor): Bufflestone

• Upper limit: Unconformity (Abut by Kaigunbo Formation)

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

• Distribution: Kitadaito island, Kitadaito city, Shimajiri county, Okinawa pref.

• Takayanagi et al. (2010) Jour. Geol. Soc. Japan, vol.116, no.4, pp.237-240 DOI