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Hachiyama Volcanic Rocks Akahane, 1980

• Volcanic rocks
• Pleistocene (0.12 - 0.05 Ma, K-Ar)

• Lithofacies:

• Lower limit: Unconformity (Suzurikawa Volcanic Rocks)

• Distribution: Kumanoyu hot spring, Yamanouchi city, Shimoakai county, Nagano pref.

• Akahane et al. (1992) Geology of the Nakano District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 106p. (in Japanese with English abstract 4p.)