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Aketo Formation (Yabe and Yehara, 1913) Hanai et al., 1968
Invalid synonym: Aketo Sandstone
- Coherent formation
- Ezo forearc basin
- Cretaceous
- Sedimentary facies: Marine
- Lithofacies: Interbedded sandstone and mudstone, Calcareous sandstone
- Sedimentary structures: Trough cross-stratification, Hummocky cross-stratification
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Aketo seashore, Tanohata city, Shimohei county, Iwate pref.
- Fossils: Ammonoids, Bivalves, Gastropods, Echinoids, Crinoids, Trace fossils
- Umetsu et al. (2013) Jour. Geol. Soc. Japan, vol.119, Supplement, pp.82-95 DOI
- Shimazu et al. (1970) Geology of the Taro District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 54p. (in Japanese with English abstract 6p.)