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Wakimoto Formation (Chitani, 1930) Shikano et al., 2011
- Sedimentary facies: Marine
- Sedimentary facies: Apex of submarine fan
- Depth of water: Calm offshore
- Depth of water: Upper bathyal (200 - 1,000 m, Foraminifera)
- Lithofacies: Sandy siltstone
- Lithofacies (Minor): Acidic tuff, Tuffaceous sandstone
- Thickness: ca. 180 m
- Upper limit: Boundary between sandy siltstone and overlying thick sandstone bed
- Upper limit: Transitional (Shibikawa Formation)
- Lower limit: Boundary between interbedded sandstone and mudstone and overlying massive sandy siltstone
- Lower limit: Conformity (Kitaura Formation)
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Cape Oibanazaki, Wakimoto, Oga city, Akita pref.; Hamamaguchi seashore - Anden seashore, Oga city, Akita pref.
- Fossils: Radiolarians, Calcareous nannofossils, Foraminifera, Diatoms, Pollen (Fagus sp., Metasequoia sp.)
- Fossils (Shellfishes): Acila nakazimai, Antiplanes contraria, Fusitoriton oregonensis, Mizuhopecten yessoensis, Mohnia yanamii, Nuculana Robai, Portlandia thraciaeformis, Turritella cf. saishuensis
- Kano et al. (2011) Geology of the Toga and Funakawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 127p. (in Japanese with English abstract 4p.)
- Shiraishi et al. (2008) Jour. Geol. Soc. Japan, vol.114, Supplement, pp.33-50 DOI
- Fujimoto et al. (2008) Jour. Geol. Soc. Japan, vol.114, Supplement, pp.51-74 DOI