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Futatsuya Formation Nozawa et al., 1975

• Collision type metamorphism by the subduction of Yangtze plate under Sino-Korea plate
• Intermediate metamorphic rocks
• Metamorphism: middle Permian - Middle Triassic (217 Ma, K-Ar)
• Intruded by: Utsubo Granite, Moriyasu Granite, Funatsu Granite, Mizunashi Granite

• Lithofacies: Felsic gneiss
• Lithofacies (Minor): Biotite gneiss, Hornblende gneiss
• Lithofacies (Protolith): Muddy sandstone, Calcareous sandstone, Mafic- Medium volcanic products-bearing sandstone

• Upper limit: Unconformity (Naratoge Formation)
• Lower limit: Transitional (Odorigawa Formation)

------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown

• Distribution: Moriyasudani valley - Miyagawa river - Nikoi - Hanedani valley, Miyagawa town, Hida city, Gifu pref.

• Nozawa et al. (1981) Geology of the Shirokimine District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 85p. (in Japanese with English abstract 10p.)
• Nozawa et al. (1975) Geology of the Hida-Furukawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 79p. (in Japanese with English abstract 9p.)