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Katsurane facies Uwatoko, 1922
Invalid synonym: Katsurane Formation
- Type locality: Katsurane oil field, Akita city, Akita prefecture
- Coherent formation
- late Pliocene
- Sedimentary facies: Marine
- Sedimentary facies: Turbidite
- Depth of water: Abyssal, Bathyal
- Lithofacies: Sandstone-dominant interbedded sandstone and mudstone, Conglomerate
- Lithofacies (Basal): Gravel-bearing sandstone, Conglomerate
- Lithofacies (Minor): Acidic tuff
- Sedimentary structures: Parallel stratification, Cross stratification, Rip-up clasts
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Katsurane oil field, Akita city, Akita pref.; Futago, Iwaki, Yurihonjo city, Akita pref.; Tentokuji - Kinshoji - Kisoishi - Saraminai, Akita city, Akita pref.
- Fossils (Shellfishes): Acila gottchei, Acila minuta, Chlamys cosibensis, Cryptonatica tugaruana, Fulgoraria prevostiana, Fusitriton oregonensis, Macoma praetexta, Nuculana pernula, Pandora pulchella, Portlandia cf. japonica
- Fossils (Foraminifera): Angulogerina hughesi, Angulogerina kokozuraensis, Bolivina decussata, Bolivinita quadrilatera, Buccella inusitata, Bulimina striata, Bulimina tenuata, Cassidulina japonica, Cassidulina norcrossi, Epistominella pulchella, Fissurina sp., Frondiculina sp., Globigerina sp., Globobulimina sp., Lenticulina cf. lucida, Martinottiella communis, Melonis barleeanum, Melonis pompilioides, Oolina sp., Oridorsalis umbonatus, Pullenia apertula, Pullenia salisburyi, Pyrog sp., Sphaeroidina bulloides, Uvigerina akitaensis, Uvigerina yabei, Valvulineria sadonica
- Nishikawa et al. (2008) Jour. Geol. Soc. Japan, vol.114, Supplement, pp.75-85 DOI
- Huzioka et al. (1977) Geology of the Akita District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 69p. (in Japanese with English abstract 5p.)
- Ozawa et al. (1977) Geology of the Honjo District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 54p. (in Japanese with English abstract 4p.)
- Huzioka et al. (1976) Geology of the Ugo-Wada District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 65p. (in Japanese with English abstract 5p.)