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Nishinorigawa Formation Sugiyama and Matsuda, 2014
- Type locality: Nishinorigawa river, Nanbu city, Minamikoma county, Yamanashi prefecture
- Coherent formation
- middle Miocene
- Sedimentary facies: Marine
- Lithofacies: Mudstone
- Lithofacies (Upper, Minor): Dacite pumice tuff, Basalt tuff
- Nishiyatsushiro Group (eastern Fujikawa river, Yamanashi pref.)
- [ Upper ]
- --------------
- Nishinorigawa Formation
- ?--?--?--?--?-
- [ Lower ]
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Nishinorigawa river, Nanbu city, Minamikoma county, Yamanashi pref.
- Sugiyama and Matsuda (2014) Geology of the Nanbu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 134p. (in Japanese with English abstract 5p.)