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Natasyo Complex
- Accretionary complex
- Deposition (Greenstones): Carboniferous (303 Ma, Nd-Sm)
- Deposition (Limestone): early - middle Permian (Fusulinids)
- Deposition (Chert): early - late Permian, Middle Triassic, Early Jurassic (Radiolarians)
- Deposition (Siliceous mudstone): Early - Middle Jurassic (Radiolarians)
- Deposition (Mudstone): Early - Middle Jurassic (Radiolarians)
- Correlation: Kochi Complex, Wachi Complex, Ashibuchi Complex, Haiya Complex, Koganegadake Unit, Mitsuo Complex
- Sedimentary facies: Marine
- Lithofacies: Mélange facies
- Matrix: Slate, Mudstone
- Exotic blocks (Slabs): Sandstone, Interbedded sandstone and mudstone, Mudstone, Chert, Greenstones, Limestone
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Fukui pref.
- Fossils (Radiolarians): Albaillella triangularis, Archaeodictyomitra sp., Canoptum? sp., Cyrtocapsa sp., Diacanthocapsa? operculi, Eucyrtidiellum unumaense, Follicucullus monacanthus, Follicucullus scholasticus, Follicucullus ventricosus, Hsuum sp., Laxtrum? jurassicum, Parahsuum? grande, Parahsuum cf. transiens, Pseudoalbaillella fusiformis, Pseudoalbaillella scalprata, Solenotryma? sp., Squinabollella? sp., Stichocapsa asiatica, Stichocapsa convexa, Stichocapsa japonica, Styngocapsa sp., Tricolocapsa cf. parvipora, Tricolocapsa plicarum, Tricolocapsa cf. ruesti, Triassocampe annulata?, Triassocampe deweveri, Yeharaia sp.
- Kimura et al. (1994) Geology of the Yotsuya District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 52p. (in Japanese with English abstract 4p.)
- Nakae (1992) Jour. Geol. Soc. Japan, vol.98, no.5, pp.401-413 DOI
- Hirokawa et al. (1958) Obama, Explanatory Text of the Geological Map of Japan, Scale 1:50,000, Geological Survey of Japan, 31p. (in Japanese with English abstract 8p.)