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Lower Formation

• Back-arc basin (Yakuno Ophiolite)
• Coherent formation
• Mata-mafic rocks: early Permian (285 Ma, Radiometric)

• Sedimentary facies: Marine
• Lithofacies: Meta-gabbro, Tonalite, Mafic lava, Mafic tuff
• Lithofacies (Minor): Mudstone

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

• Distribution: Kyoto pref.

• Takemura et al. (2009) Jour. Geol. Soc. Japan, vol.115, Supplement, pp.123-137 DOI