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N3
- Type locality: Sakatai - Kazai - Kshokuchi, Tanabe city, Wakayama prefecture
- Accretionary complex
- Paleogene, or Late Cretaceous, Campanian
- Sedimentary facies: Marine
- Sedimentary facies: Continental shelf, Upper continental slope
- Lithofacies (Upper): Mudstone-dominant interbedded sandstone and mudstone
- Lithofacies (Upper, Minor): Sandstone
- Lithofacies (Lower): Shale
- Lithofacies (Lower, Minor): Mudstone-dominant interbedded sandstone and mudstone, Greenstones, Limestone
- Sedimentary structures: Load structure, Graded bedding, Parallel structure, Flute marks, Groove marks
- Paleocurrent (Lateral current flow): to North - Northwest
- Thickness: ca. 590 - 900 m
- Nyunokawa Formation
- [ Upper ]
- /--/--/--/--/-
- N5
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- N4
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- N3
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- N2
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- N1
- /--/--/--/--/-
- [ Lower ]
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Sakatai - Kazai - Kshokuchi - Mount Toragamine - Mount Kasatoyama - Sugano - Kuchiaidani valley - Sainotani valley - Mount Andosan - Mount Kashiomoriyama - Kumondani valley - Mount Hyakuzenmoriyama, Tanabe city, Wakayama pref.; Teragaito - Tonoi, Totsukawa city, Yoshino county, Nara pref.
- Fossils (Trace fossils): Terebellina isp.
- Tokuoka et al (1981) Geology of the Ryujin District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 69p. (in Japanese with English abstract 6p.)