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Mineoka Group Aoki, 1925
- Type locality: Mineoka mountans, Chiba prefecture
- Accretionary complex
- Deposition: Eocene - early Miocene
- Alkaline basalt: early Miocene (19.6 Ma, K-Ar)
- Diolite: Miocene (14 Ma, K-Ar)
- Correlation: Setogawa Group, Enokibatake Formation (Shimanto Belt)
- Intruded by: Mineoka Body, Kamogawa Basalt
- Sedimentary facies: Marine
- Sedimentary facies: Terrigenous clastic rocks, Pelagic sediments, Ophiolites
- Lithofacies: Shale, Siliceous shale, Interbedded shale and sandstone
- Lithofacies (Minor): Sandstone, Chert, Marl, Limestone, Tuff
- Lithofacies (Ophiolites): Serpentinite (Harzburgite origin), Tholeiitic basalt, Gabbro, Diolite
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Mount Atagoyama - Heguri, Minamiboso city, , Chiba pref.; Isomura, Kamogawa city, Chiba pref.
- Fossils: Crinoides, Foraminifera, Radiolarians
- Takahashi et al. (2016) Jour. Geol. Soc. Japan, vol.122, no.8, pp.375-395, DOI
- Kawakami and Shishikura (2006) Geology of the Tateyama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 82p. (in Japanese with English abstract 5p.)
- Suzuki et al. (1990) Geology of the Nago District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 48p. (in Japanese with English abstract 3p.)
- Nakajima et al. (1981) Geology of the Kamogawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 107p. (in Japanese with English abstract 7p.)