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Towa Granodiorite
- Plutonic rocks
- Late Cretaceus
- Lithofacies: Granodiorite
- Younger Ryoke Granitoids (Suooshima island, Yamaguchi pref.)
- [ Young ]
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- Towa Granodiorite
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- [ Old ]
------ Transitional, ~~~~~~ Intrusive, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Hashirajima island - Hashima island - Teshima island - Hodakajima island, Iwakuni city, Yamaguchi pref.; Towa - Tachibana - Nasakejima island - Ukajima island, Suooshima city, Oshima county, Yamaguchi pref.
- Matsuura (1997) Geology of the Kurahashi Jima and Hashira Jima District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 53p. (in Japanese with English abstract 4p.)