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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 dykes
- Lithofacies: Dacite - Rhyolite welded tuff, Dacite lava, Biotite rhyolite lava, Lapilli tuff, Tuff, Tuff breccia
------ 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.)