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Tokusagamine Sandstone-Mudstone Member (Ikawa and Imaoka, 2001) Imaoka et al, 2019

Tuffaceous sedimentary rocks were separated as Efunegawa Sandstone-Mudstone Member.

• Type locality: southern flank of Mount Tokusa, Ato, Yamaguchi city, Yamaguchi prefecture
• Volcano-plutonic complex
• Volcanic rocks
• Late Cretaceous

• Lithofacies: Conglomerate, Sandstone, Mudstone

• Thickness: 3 - 300 m
• Upper limit: Conformity (Togoroeki Welded Tuff Member)
• Lower limit: Conformity (Kane Welded Tuff Member)

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

• Distribution: southern flank of Mount Tokusa, Ato, Yamaguchi city, Yamaguchi pref.; Mount Tsuzura - Yunoki, Tokuzi, Yamaguchi city, Yamaguchi pref.; Shinome, Ato, Yamaguchi pref. Yamaguchi pref.

• Imaoka et al. (2019) Jour. Geol. Soc. Japan, vol.125, no.7, pp.529-553 DOI