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Futomiyama Group Ikebe, 1950

• Type locality: Oyabegawa river, Tori, Nanto city, Toyama prefecture
• Volcanic rocks
• Paleogene (66.7 - 66.2, 59 Ma, K-Ar)
• Correlation: Ishizaka Formation
• Intruded by: Andesite dikes

• Lithofacies: Dacite - Rhyolite welded tuff, Dacite lava, Biotite rhyolite lava, Lapilli tuff, Tuff, Tuff breccia

• Thickness: Several hundred - 700 m
• Upper limit: Unconformity (Nirehara Formation, Tazo Sandstone Member, Shohayatsukigawa Conglomerate Member, Orido Tuff Member, Furukakuma Sandstone Member)
• Lower limit: Unconformity (Jinzu Group, Funatsu Granitic Rocks)

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

• Distribution: Ishikawa pref. - Toyama pref. - Gifu pref. - Niigata pref.
• Distribution: Oyabegawa river, Tori, Nanto city, Toyama pref.; Sasagawa river, Asahi city, Shimoniikawa county, Toyama pref.; Akebi - Okuhirasawa - Furukakuma - Matsukura - Toratani - Kurotani, Uozu city, Toyama pref.; Yomogizawa - Tazo - Mount Shiritakayama - Mount Shirakurayama - Kamiichigawa river, Kamiichi city, Nakaniikawa county, Toyama pref.; Nakamura, Namerigawa city, Toyama pref.

• Takeuchi et al. (2017) Geology of the Tomari District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 121p. (in Japanese with English abstract 4p.)
• 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.)
• Sumi and Nozawa (1973) Geology of the Uozu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 104p. (in Japanese with English abstract 5p.)
• Nozawa and Sakamoto (1960) Gohyakkoku, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 68p. (in Japanese with English abstract 10p.)