[ Top ] [ Japanese ]

Shinatani Formation Sato and Hayami, 1956

• Type locality: Shinatani valley, Agero, Itoigawa city, Niigata prefecture
• Coherent formation
• Jurassic

• Sedimentary facies: Marine
• Lithofacies (Upper): Sandstone
• Lithofacies (Lower): Interbedded sandstone and mudstone
• Sedimentary structures (Lower): Graded bedding, Parallel stratification

• Thickness: ca. 800 m
• Upper limit: Conformity (Otakidani Formation)
• Lower limit: Conformity (Bottm of the sandstone bed)
• Lower limit: Conformity (Teradani Formation)

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

• Distribution: Shinatani valley, Agero, Itoigawa city, Niigata pref.; Mount Shiratoriyama - Mount Komagatake, Itoigawa city, Niigata pref. - Asahi city, Shimoniikawa county, Toyama pref.; Teradani, Asahi city, Shimoniikawa county, Toyama pref.
• Fossils: Shellfishes

• Takeuchi et al. (2017) Geology of the Tomari District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 121p. (in Japanese with English abstract 4p.)
• Takeuchi et al. (2015) Jour. Geol. Soc. Japan, vol.121, no.7, pp.193-216, DOI