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Yanagisawa Formation (Chiji, 1955) Nakano et al., 2002
Invalid synonym: Fufuiwa Formation, Shinkawa Formation
- Type locality: Yanagisawa pass, Kinasa, Nagano city - Hakuba city, Kitaazumi county, Nagano prefecture
- Coherent formation (Chiji, 1955)
- late Miocene - early Pliocene (7.89 Ma)
- Correlation: Ronji Formation
- Sedimentary facies: Marine
- Lithofacies: Sandstone, Interbedded mudstone and sandstone
- Lithofacies (Minor): Sandy mudstone, Andesite tuffaceous sandstone, Felsic tuff, Conglomerate
- Sedimentary structures: Sole marks, Slump structure, Parallel stratification
- Paleocurrent: from South - Southwest
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Yanagisawa pass, Kinasa, Nagano city - Hakuba city, Kitaazumi county, Nagano pref.; Nishikyo - Kinasa, Nagano city, Nagano pref.; Karayama, Hakuba city, Kitaazumi county, Nagano pref.
- Fossils: Shellfishes (Mizuhopecten sp.), Foraminifera (Epistominella sp., Haplophragmoides sp., Martinottiella communis)
- Nagamori et al. (2010) Geology of the Kotaki District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 130p. (in Japanese with English abstract 4p.)
- Nagamori et al. (2003) Geology of the Togakushi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 109p. (in Japanese with English abstract 3p.)
- Nakano et al. (2002) Geology of the Shiroumadake District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 105p. (in Japanese with English abstract 5p.)
- Kato et al. (1989) Geology of the Omachi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 111p. (in Japanese with English abstract 7p.)