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Kunitan Formation
- Coherent formation
- Ezo forearc basin
- Late Cretaceous, Santonian
- Sedimentary facies: Shallow marine
- Sedimentary facies: Upper shoreface - Inner shelf
- Lithofacies: Sandstone
- Lithofacies (Minor): Sandy siltstone, Conglomerate
- Lithofacies (Upper): Sandstone
- Lithofacies (Upper, Minor): Conglomerate, Mudstone, Tuff
- Lithofacies (Middle): Sandstone
- Lithofacies (Middle, Minor): Conglomerate
- Lithofacies (Lower): Sandstone
- Lithofacies (Lower, Minor): Mudstone, Conglomerate
- Sedimentary structures: Trough cross-stratification, Hummocky cross-stratification, Foreset cross-stratification
- Thickness: 165 - 220 m
- Thickness (Upper): 60 - 80 m
- Thickness (Middle): 60 - 70 m
- Thickness (Lower): 50 - 80 m
- Upper limit: Conformity (Sawayama Formation)
- Lower limit: Conformity (Tamagawa Formation)
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Tamagawa seashore, Noda city, Kunohe county, Iwate pref.
- Fossils (Upper): Bivalves (Ezonuculana cf. mactraeformis, Lucina cf. fallax, Eriphyla? sp.), Silicified wood, Pipe rocks
- Fossils (Middle): Ammonoids (Gaudryceras sp.), Arcidae spp., Inoceramus japonicus, Inoceramus naumanni, Lucina cfr. fallax, Neilonella? sp., Portlandia sp.
- Fossils (Lower): Caryocorbla sp.Crassostrea? sp., ƒGƒr (Linuparus japonicus), Lucina cfr. fallax
- Fossils (Ammonoids): Polyptychoceras subundulatum, Gaudryceras denseplicatum, Texanites amakusense
- Fossils (Sharks): Lamna sp., Odontaspis complanata, Otodus cfr. nasus, Oxyrhina sp.
- Fossils (Bivalves): Glycymeris sp., Inoceramus japonica, Nucula sp., Panopea sp.,
- Fossils (Plants): Phyllites sp., Zamiophyllum cfr. bachianum
- Umetsu et al. (2013) Jour. Geol. Soc. Japan, vol.119, Supplement, pp.82-95 DOI
- Yoshida et al. (1987) Geology of the Rikuchu-Ono District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 70p. (in Japanese with English abstract 6p.)
- Shimazu and Teraoka (1962) Rikuchu-Noda, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 53p. (in Japanese with English abstract 11p.)