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Ikokuma Andesites
Invalid synonym: Ikokuma Formation
- Type locality: Ikokuma, Kazamaura city, Shimokita county, Aomori prefecture
- Volcanic rocks
- Miocene
- Correlation: Wakinosawa Andesites
- Lithofacies: Pyroxene andesitic tuff breccia
- Lithofacies: Quartz-bearing andesite, Pyroxene andesitic lava, Dacite, Sandstone, Mudstone
- Oma, Aomori pref.
- [ Upper ]
- ~~~~~~~~~~~~~~
- Ikokuma Andesites
- '''''''/,,,,,,
- Oma Formation
- ?--?--?--?--?-
- [ Lower ]
- Sai - Ohata river, Aomori pref.
- [ Upper ]
- ~~~~~~~~~~~~~~
- Ikokuma Andesites
- ~~~~~~~~~~~~~~
- Yagen Formation
- ~~~~~~~~~~~~~~
- Sai Formation
- ~~~~~~~~~~~~~~
- [ Lower ]
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Oma city - Sai city, Shimokita county, Aomori pref.; Ikokuma river - Ikokuma, Kazamaura city, Shimokita county, Aomori pref.; Ohata river, Mutsu city, Aomori pref.
- Uemura (1962) Oma and Sai, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 39p. (in Japanese with English abstract 6p.)
- Uemura and Saito (1957) Ohata, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 31p. (in Japanese with English abstract 8p.)