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Ojika Tuff Breccia
- Type locality: Yoshida - Mitoku, Misasa city, Tohaku county, Tottori prefecture
- Volcanic rocks
- Miocene
- Lithofacies (Upper): Dacite tuff, Lapilli tuff, Tuff breccia, Dikes
- Lithofacies (Upper, Minor): Sandstone Mudstone
- Lithofacies (Middle): Rhyolite lava, Tuff breccia, Dikes
- Lithofacies (Middle, Minor): Tuff, Lapilli tuff, Sandstone Mudstone
- Lithofacies (Lower): Tuff breccia, Volcanic conglomerate
- Sedimentary structures (Middle): Flow structure
- Thickness: 160 m or thicker
- Thickness (Lower): 50 m or thicker
- Upper limit: Transitional (Nageiredo Tuff Breccia)
- Lower limit: Unconformity (Granite)
- Kurayoshi, Tottori pref.
- [ Upper ]
- ~~~~~~~~~~~~~~
- Nageiredo Tuff Breccia
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- Ojika Tuff Breccia
- ~~~~~~~~~~~~~~
- [ Lower ]
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Yoshida - Mitoku - Kannokura - Takahashi - Sakamoto, Misasa city, Tohaku county, Tottori pref.
- Fossils: Plant fragments
- Murayama and Ozawa (1961) Aoya & Kurayoshi, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 71p. (in Japanese with English abstract 5p.)