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Okiura Dacite Muraoka and Hase, 1990
Invalid synonym: Upper Member of Aoni Formation
- Type locality: Nishonai river, Kuroishi city, Aomori prefecture
- Post-caldera dome
- Lava dome, Ring dyke
- Volcanic rocks
- Pleistocene (0.9 - 0.7 Ma)
- Sedimentary facies: Lacustrine, Terrestrial
- Lithofacies: Dacite lava
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Nishonai river, Kuroishi city, Aomori pref.; Futatsumori - Mount Tashiro - Mount Ikazuchi - Mount Kenashi, Kuroishi city, Aomori pref.; Okogawa creek, Kuroishi 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.)