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Tochihara Formation Yoshikawa et al., 2005

• Type locality: Ikuno tunnel, Tochihara, Ikuno, Asago city, Hyogo prefecture
• Volcanic rocks
• Late Cretaceous

• Sedimentary facies (Lower, Minor): Caldera-collapse deposits
• Lithofacies (Top): Mudstone, Sandstone
• Lithofacies (Upper): Tuffaceous sandstone, Mudstone
• Lithofacies (Lower): Dacite welded lapilli tuff, Breccia

• Thickness: 240 m or thicker
• Upper limit: Unconformity (Ikuno Formation, Kasagatayama Formation)

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

• Distribution: Tochihara, Ikuno, Tochihara, Asago city, Hyogo pref.

• Yoshikawa et al. (2005) Geology of the Ikuno District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 48p. (in Japanese with English abstract 3p.)