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Kojisawa Diorite Harayama et al., 1991

• Type locality: 1,450 - 1,570 m above sea level, Kojisaw creek, Takasegawa river, Omachi city, Nagano prefecture
• Plutonic rocks
• Xenolith in Kanazawa Granodiorite
• Cretaceous (4.65 Ma, K-Ar)
• Intruded by: Nanashizawa Diorite

• Lithofacies: Biotite hornblende pyroxene monzodiorite
• Structures: Banded

• Distribution: 400 x 300 m²

• Distribution: Kojisaw creek, Takasegawa river, Omachi city, Nagano pref.

• Harayama et al. (1991) Geology of the Yarigatake District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 190p. (in Japanese with English abstract 8p.)