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Koshin volcano

• Volcanic rocks
• Stratovolcano
• Pleistocene

• Lithofacies: Augite-bearing hypersthene andesite lava, Tuff breccia

• Source: Mount Koshinzan
• Lower limit: Unconformity (Matsuki Quartz Porphyry)

• Distribution: Mount Koshinzan, Ashio town, Nikko city, Tochigi pref.

• Kawata and Ozawa (1955) Ashio, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 57p. (in Japanese with English abstract 7p.)
• Kawata (1955) Nantaizan, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 43p. (in Japanese with English abstract 7p.)