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Diorite Porphyry 3 Nagamori et al., 2003

Quartz phenocryst bearing

• Plutonic rocks
• Pleistocene (0.75 Ma, FT; 1.13 Ma, K-Ar)
• Intruded in: Tanogashira Formation, Hikage Formation

• Sedimentary facies: Sills, Laccoliths
• Lithofacies: Diorite porphyry

• Distribution: Mount Takazuma - Jigoku valley, Nagano city, Nagano pref.

• Nagamori et al. (2003) Geology of the Togakushi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 109p. (in Japanese with English abstract 3p.)