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Hoyo Quartz Diorite

• Type locality: Enokitoge pass, Fukuchiyama city, Kyoto prefecture - Aogaki town, Tanba city, Hyogo prefecture
• Plutonic rocks
• Cretaceous (79.4 Ma, K-Ar)

• Lithofacies: Quartz diorite, Quartz monzodiorite
• Lithofacies (Minor): Biotite granite

• Distribution (East - West): ca. 1.3 km
• Distribution (South - North): ca. 1.3 km
• Upper limit: Conformity (Arima Group)

• Distribution: Fukuchiyama city, Kyoto pref.; Aogaki town, Tanba city, Hyogo pref.

• Kurimoto and Makimoto (1990) Geology of the Fukuchiyama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 97p. (in Japanese with English abstract 5p.)