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Narukawa Granite
- Plutonic rocks
- Late Cretaceus (79.5 Ma, Rb-Sr; 82.0 Ma, U-Pb; 87.0 Ma, SHIRIMP)
- Transitional: Katano Granite
- Miyachi et al. (2001) Geology of the Osaka-Tohokubu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 130p. (in Japanese with English abstract 6p.)