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Lower Teradomari Formation

• Coherent formation
• late Miocene
• Correlation: Yokobatake Member

• Sedimentary facies: Marine
• Lithofacies: Mudstone-dominant interbedded sandstone and mudstone
• Lithofacies (Minor): Sandstone

• Upper limit: Nz Tephra, Lithology or Foraminifera zones
• Upper limit: Conformity (Taruda Formation, Tomikura Formation)
• Lower limit: Top of S Tuff bed
• Lower limit: Conformity (Nanbayama Formation)

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

• Distribution: Takada plain, Niigata pref.

• Takano (2011) Jour. Geol. Soc. Japan, vol.117, no.4, pp.238-258 DOI
• Yanagisawa et al. (2000) Geology of the Iiyama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 144p. (in Japanese with English abstract 6p.)