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Omi Granite Ishibashi, 1986

• Type locality: Itoigawa city, Niigata prefecture
• Plutonic rocks
• Late Cretaceous (92.7 Ma, FT, 90.8 Ma, U-Pb)
• Intruded by: Andesite dike
• Intruded in: Maizuru Group

• Lithofacies (East): Two-mica granite
• Lithofacies (West): Biotite granite

• Distribution: southwestern coast - the left bank of Omigawa river, Itoigawa city, Niigata pref.

• Nagamori et al. (2018) Geology of the Itoigawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 75p. (in Japanese with English abstract 3p.)