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Nirehara Formation (Tsuda and Chiji, 1950) Nakajima et al., 2019

Nirehara Formation had been a member of Yatsuo Group.

• Type locality: Jinzu river, Nirehara, Toyama city, Toyama prefecture
• Coherent formation
• early Miocene

• Sedimentary facies (Upper): Shallow marine or Lake
• Sedimentary facies (Lower): Alluvial fan, Gravelly fan delta
• Lithofacies: Conglomerate, Sandstone Mudstone
• Lithofacies (Bottom): Conglomerate

• Upper limit: Unconformity (Iwaine Formation)
• Lower limit: Unconformity (Tetori Group)

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

• Distribution: Nirehara - Imozu, Osawano town - Kiridani, Yatsuo town, Toyama city, Toyama pref.

• Nakajima et al. (2019) Jour. Geol. Soc. Japan, vol.125, no.7, pp.483-516 DOI
• Kunugiza et al. (2010) Jour. Geol. Soc. Japan, vol.116, Supplement, pp.83-101 DOI