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Chojanotebako Intrusive Rock Shimazu et al., 1971

Invalid synonym: Kuroiwa Intrusive Rock

• Type locality: Minamikuroiwa, Kakizaki ward, Joetsu city, Niigata prefecture
• Intrusive rocks
• Pliocene - Pleistocene
• Intruded in: Ogaya Formation

• Lithofacies: Pyroxene andesite
• Structures: Columnar joint

• Distribution: Minamikuroiwa, Kakizaki ward, Joetsu city, Niigata pref.

• Kobayashi et al. (1989) Geology of the Okanomachi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 112p. (in Japanese with English abstract 5p.)