Alternation facies

Coherent formation
late Pliocene

Sedimentary facies: Marine
Lithofacies: Interbedded siltstone and sandstone

Thickness: 0 - 300 m
Upper limit: Transitional (Tentokuji facies)
Lower limit (Funakawa Formation): Bottom of the thick white acidic tuff bed
Lower limit: Transitional (Katsurane facies), Conformity (Funakawa Formation)

Tentokuji Formation
[ Upper ]
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Tentokuji facies
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Alternation facies
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Katsurane facies
~~~~~~~~~~~~~~
[ Lower ]

Oga peninsula - Dewa hills, Akita pref.
[ Upper ]
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Sasaoka Formation
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Tentokuji Formation
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Funakawa Formation
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[ Lower ]

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

Distribution: Senshu park - Tegata, Akita city, Akita pref.
Fossils (Foraminifera): Angulogerina hughesi, Angulogerina kokozuraensis, Bolivina decussata, Bulimina striata, Bulimina tenuata, Cassidulina norcrossi, Epistominella naraensis, Epistominella nipponica, Epistominella pulchella, Frondicularia sp., Globigerina sp., Globobulimina sp., Hanzawaia nipponica, Lenticulina sp., Loxostomoides bradyi, Milliammina sp., Pullenia apertula, Sphaeroidina bulloides

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.)