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Gomyo Formation (Kishida and Wadatsumi, 1967) Sato et al., 2016

Invalid synonym: Gomyo Welded Tuff, Takidani Member

• Type locality: Ayukaerigawa river - Higashigomyo, Aioi city, Hyogo prefecture
• Volcanic rocks
• Late Cretaceous (86.2 Ma, U-Pb)
• Intruded by: Tenkadaiyama Rhyolite

• Lithofacies: Pyroclastic flow deposit
• Lithofacies: Clinopyroxene biotite hornblende dacite welded crystalline tuff
• Sedimentary structures: Platy joints, Columnar joints

• Thickness: 300 m or thicker
• Upper limit: Conformity (Hatsutoji Member)
• Lower limit: Unconformity (Yamasaki Formation, Minamiyama Complex)

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

• Distribution: Higashigomyo - Nishigomyo, Wakasano town, Aioi city, Hyogo pref.; Issai town, Tatsuno city, Hyogo pref.

• Sato et al. (2016) Geology of the Banshu-Ako District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 68p. (in Japanese with English abstract 3p.)
• Igi and Wadatsumi (1980) Geology of the Kamigori District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 74p. (in Japanese with English abstract 4p.)