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Hirotani Formation

• Coherent formation
• Triassic
• Correlation: Miharaiyama Group

• Sedimentary facies: Marine
• Lithofacies: Conglomerate, Sandstone
• Lithofacies (Minor): Slate

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

• Distribution: Mount Okurabesan - Fujiwa, Asago city, Hyogo pref.; Hirotani, Yabu city, Hyogo pref.

• Hirokawa (1954) Tajima-Takeda, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 20p. (in Japanese with English abstract 9p.)