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Tenkadaiyama Group Kishida and Wadatsumi, 1967

• Type locality: Mount Tenkadaiyama, Aioi city, Hyogo prefecture
• Coherent formation
• Cretaceous - Paleogene (69.9 Ma, Rb-Sr)

• Lithofacies: Rhyolite lava, Pyroclastic rocks
• Paleocurrent: to North

• Lower limit: Unconformity (Ako Formation, Tsurukamejobu Formation)

• Distribution: Mount Tenkadaiyama - Nishigomyo, Aioi city, Hyogo pref.

• 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.)