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Niho Dike Group Yoshida, 1961
- Intrusive rocks
- Cretaceous
- Lithofacies: Biotite granite, Porphyrite dikes (Some dozen dikes)
- Distribution (Width): 10 - 80 m
- Distribution (Length): ca. 500 - 800 m
- Hiroshima Granites (Hiroshima, Hiroshima pref.)
- [ Young ]
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- Niho Dike Group
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- [ Old ]
------ Transitional, ~~~~~~ Intrusive, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Mount Koganeyama, Hiroshima city, Hiroshima pref.; Mukainada, Fuchu city, Aki county, Hiroshima pref.
- Takagi and Mizuno (1999) Geology of the Kaitaichi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 49p. (in Japanese with English abstract 4p.)
- Takahashi (1991) Geology of the Hiroshima District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 41p. (in Japanese with English abstract 3p.)