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Zenkoshidaira Porphyrite

• Intrusive rocks
• Paleogene?
• Intruded by: Rhyolite dyke
• Intruded in: Ariake Granite

• Lithofacies: Porphyrite

• Distribution: Zenkoshidaira - Takasegawa river, Taira, Omachi city, Nagano pref.

• Kato and Sato (1983) Geology of the Shinano-Ikeda District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 93p. (in Japanese with English abstract 7p.)