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Shibakura Quartz Gabbro

• Plutonic rocks
• Neogene

• Lithofacies: Quartz gabbro

• Upper limit: Transitional (Tsuchitaru Quartz Diorite)

------ Transitional, ~~~~~~ Intrusive, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

• Distribution: Shinshimizu tunnel, Minakami city, Tone county, Gunma pref. - Yuzawa city, Minamiuonuma county, Niigata pref.

• Chihara et al. (1981) Geology of the Echigo-Yuzawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 108p. (in Japanese with English abstract 8p.)