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Naratoge Formation

• Volcanic rocks
• Miocene

• Sedimentary facies (Basal): Aqueous
• Sedimentary facies (Basal): Talus
• Lithofacies: Augite hypersthene andesite lava, Dacite
• Lithofacies (Lower): Augite hypersthene andesite tuff breccia
• Lithofacies (Basal): Gravel-bearing sandstone
• Sedimentary structures (Basal): Parallel stratification

• Thickness: 300 - 400 m
• Upper limit: Unconformity (Nakao Pyroclastic Flow Deposit)
• Lower limit: Unconformity (Futatsuya Formation, Mannami Formation, Kongodo Formation, Mizunashi Granite)

• Distribution: Nara pass - Futatsuya - Tsukigase, Kawai 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.)