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Okawazawa Granite Ishizawa, 1982

• Plutonic rocks
• Paleogene (57 - 56 Ma)
• Intruded by: Felsic rocks
• Intruded in: Ariake Granite, Kitamata Welded Tuff

• Lithofacies: Hornblende biotite granodiorite

• Distribution: Okawazawa creek - Arasawa creek - Nigorisawa creek - Otsumetazawa creek - Kotsumetazawa creek - Daigozawa creek, Omachi city, Nagano pref.

• Kato et al. (1989) Geology of the Omachi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 111p. (in Japanese with English abstract 7p.)