[ Top ] [ Japanese ]

Matsuki Quartz Porphyry

• Plutonic rocks
• Cretaceous?

• Lithofacies: Quartz porphyry

• Upper limit: Unconformity (Koshin volcano)

• Distribution: Matsuki creek, 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.)