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Aioi Group

• Volcanic rocks
• Late Cretaceous (118, 74, 73 Ma, Rb-Sr)
• Correlation: Arima Group, (Invalid name) Ikuno Group, Yadagawa Group
• Intruded by: Harima Intrusives

• Lithofacies: Acidic - Intermediate volcanic rocks, Volcaniclastic rocks

• Upper limit: Unconformity (Tenkadaiyama Group)
• Lower limit: Fault? (Hiraki Formation), Unconformity (Yakuno Complex)

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

• Distribution: Hyogo pref.

• Kobayashi (2008) Jour. Geol. Soc. Japan, vol.114, no.2, pp.80-87 DOI
• Ozaki and Matsuura (1988) Geology of the Sanda District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 93p. (in Japanese with English abstract 5p.)
• 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.)