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Hiroshima Granites

• Type locality: Sanyo region, Western Japan
• Plutonic rocks
• Cretaceous (93 Ma, K-Ar, Younger than Younger Ryoke Granitoids)
• Intruded by: Dolerite
• Intruded in: Yoshiwa Group, Yuki Formation, Tsuno Group, Nishiki Group, Hikimi Group

• Lithofacies: Biotite granite
• Lithofacies (Minor): Quartz diorite, Hornblende biotite granite, Gabbro

• Upper limit: Unconformity (Setouchi Volcanic Rocks, Yokoyama Andesite)

------ Transitional, ~~~~~~ Intrusive, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

• Distribution: Otagawa river - Tsuda - Kujima - Akutani - Hariyama - Mount Megahirayama - Yoshiwa - Kumazaki - Ono town - Tsuzurawara - Hachimangawa river - Nogakogen - Ohara - Yuzuri, Hatsukaichi city, Hiroshima pref.; Utsuodani - Numata town - Kuchi - Gion town - Ishigatanigawa river - Fushidani - Yoshiyama, Hiroshima city, Hiroshima pref.; Nagase valley, Yoshika city, Kanoashi county, Shimane pref.; Okayama pref.; Yamaguchi pref.; Shodoshima island, Kagawa pref.; Ehime pref.

• Terabayashi et al. (2017) Jour. Geol. Soc. Japan, vol.123, no.8, pp.599-612 DOI
• Tatsumi et al. (2010) Jour. Geol. Soc. Japan, vol.116, no.12, pp.661-679 DOI
• Kawamura (2010) Jour. Geol. Soc. Japan, vol.116, no.1, pp.27-44 DOI
• Fujita and Yokoyama (2009) Jour. Geol. Soc. Japan, vol.115, Supplement, pp.89-107 DOI
• Kishi et al. (2007) Jour. Geol. Soc. Japan, vol.113, no.9, pp.479-491 DOI
• Takahashi (1991) Geology of the Hiroshima District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 41p. (in Japanese with English abstract 3p.)
• Takahashi et al. (1989) Geology of the Tsuda District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 56p. (in Japanese with English abstract 4p.)
• Huzita and Kasama (1982) Geology of the Osaka-Seihokubu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 112p. (in Japanese with English abstract 8p.)
• Mitsuno and Omori (1965) Susai, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 59p. (in Japanese with English abstract 17p.)