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Sarukura Formation Furukawa and Nagamori, 2018

• Type locality: Sarukura - Shimamichi, Itoigawa city, Niigata prefecture
• Volcanic rocks
• early Pleistocene

• Lithofacies: Basaltic andesite - Andesite volcanic breccia, Tuff breccia

• Thickness: ca. 100 - 150 m
• Upper limit: Unconformity (Eboshiyama Formation, Takanomine Formation)
• Lower limit: Unconformity (Nechi Formation)

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

• Distribution: Sarukura - Shimamichi - Sotoyama - Konouragawa river, Itoigawa city, Niigata pref.

• Nagamori et al. (2018) Geology of the Itoigawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 75p. (in Japanese with English abstract 3p.)