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Aioi Group

• Volcanic rocks
• Late Cretaceous (118, 74, 73 Ma, Rb-Sr)

• Lithofacies: Volcanic rocks, Volcaniclastic rocks

• Lower limit: Fault? (Hiraki Formation)

• 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.)