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Old stage

• Type locality: Tottori prefecture
• Volcanic rocks
• middle Pleistocene (10.2 - 0.27 Ma, K-Ar)

• Sedimentary facies: Flank volcano, Lava dome, Lava, Debris flow
• Lithofacies: Dacite

• Upper limit: Unconformity (Young stage)

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

• Distribution: Tottori pref.

• Yamamoto (2017) Bull. Geol. Surv. Japan, vol.68, no.1, pp.1-16 DOI
• Sawada et al. (2009) Jour. Geol. Soc. Japan, vol.115, Supplement, pp.51-70 DOI