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Tachiusu Sandstone Member

• Type locality: Akka river, Akka Tachiusu, Iwaizumi city, Shimohei county, Iwate prefecture
• Accretionary complex
• Deposition: Late Jurassic, Oxfordian (Ammonoids)

• Sedimentary facies: Marine
• Lithofacies: Grain-supported poorly-sorted coarse sandstone

• Thickness: 200 m
• Upper limit: Fault
• Lower limit: Fault

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

• Distribution: Akka Tachiusu, Iwaizumi city, Shimohei county, Iwate pref.
• Fossils: Ammonoids

• Takahashi et al. (2016) Jour. Geol. Soc. Japan, vol.122, no.1, pp.1-22, DOI