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Hanzogane Formation Kobayashi et al., 1991

• Type locality: Nishitani river, Hanzogane, Tochio city, Niigata pref.
• Coherent formation
• middle Miocene
• Correlation: Nanatani Formation

• Water temperature: Warm ocean current (Foraminifera)
• Depth of water: Upper - Middle bathyal (Foraminifera)
• Lithofacies: Mudstone

• Thickness: 200 m or thicker

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

• Distribution: Nishitani river, Hanzogane, Tochio city, Niigata pref.
• Fossils (Foraminifera): Bulimina cf. striata, Cibicides cf. pseudoungerianus, Cibicides cf. ungerianus, Cribrostomoides cf. subglobosum, Ellipsonodosaria sp., Elphidium sp., Fursenkoina complanata, Globigerina praebulloides, Globigerinoides trilobus, Globoquadrina altispira, Globorotalia peripheroacuta, Globorotalia peripheroronda, Globorotalia quinifalcata, Globorotalia scitula praescitula, Globorotalia siakensis, Gyroidina orbicularis, Hopkinsina sinboi, Lagena sp., Lenticulina sp., Martinottiella communis, Melonis pacificum, Melonis cf. pompilioides, Nonionellina labradorina, Planulina sp., Pullenia bulloides, Pullenia cf. salisburyi, Sigmoilopsis schlumbergeri, Sphaeroidina bulloides, Sphaeroidinellopsis seminulina, Uvigerina sp., Valvulineria glabra
• Fossils (Calcareous nannofossils): Calcidiscus leptoporus, Calcidiscus macintyrei, Calcidiscus premacintyrei, Coccolithus miopelagicus, Coccolithus pelagicus, Cyclicargolithus floridanus, Dictyococcites antarcticus, Discoaster variabilis, Discolithina multipora, Helicosphaera carteri, Reticulofenestra gelida, Reticulofenestra pseudoumbilica, Sphenolithus abies, Sphenolithus moriformis

• Kobayashi et al. (1991) Geology of the Nagaoka District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 132p. (in Japanese with English abstract 6p.)