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Oguni Lacustrine Formation Muraoka and Takakura, 1988
- Type locality: Zenkojidaira, Hirakawa city, Aomori prefecture
- Caldera-fill deposit
- Coherent formation
- Pleistocene (ca. 1.1 - 0.5 Ma)
- Sedimentary facies: Lacustrine
- Lithofacies: Sandstone, Siltstone
- Lithofacies (Minor): Conglomerate
- Sedimentary structures: Cross stratification, Slump structures
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Zenkojidaira, Hirakawa city, Aomori pref.
- Takarada and Muraoka (2004) Geology of the Hakkoda San District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 86p. (in Japanese with English abstract 4p.)
- Muraoka and Hase (1990) Geology of the Kuroishi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 124p. (in Japanese with English abstract 8p.)