Nishiyoshino Subgroup

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Nishiyoshino Subgroup

Invalid synonym: Nishiyoshino Group, Yushio Group

Type locality: Nyukawa river - Mount Takadake, Shimoichi city, Yoshino county, Nara prefecture
Accretionary complex
Early Cretaceous

Sedimentary facies: Marine
Lithofacies: Shale, Slate
Lithofacies (Minor): Sandstone, Greenstones, Chert

Thickness: 600 - 1,300 m
Upper limit: Thrust fault (Osako Tectonic Line, Wasabidani Complex), Thrust fault (Karato Tectonic Line, Heibara Subgroup)
Lower limit: Thrust fault (Tenkawa Subgroup)

Hidakagawa Group (Tenkawa, Nara pref.)
[ Upper ]
/--/--/--/--/-
Heibara Subgroup
/--/--/--/--/-
Nishiyoshino Subgroup
/--/--/--/--/-
Tenkawa Subgroup
/--/--/--/--/-
Uenoji Subgroup
/--/--/--/--/-
Hiradani Subgroup
/--/--/--/--/-
[ Lower ]

Shimanto Belt (Nara pref.)
[ Upper ]
/--/--/--/--/-
Koyasan Group = North Shimanto
/--/--/--/--/-
Hidakagawa Group = North Shimanto
/--/--/--/--/-
Hikigawa Group = South Shimanto
/--/--/--/--/-
[ Lower ]

Shimanto Belt (Wakayama pref.)
[ Upper ]
/--/--/--/--/-
Koyasan Group = North Shimanto
/--/--/--/--/-
Hidakagawa Group = North Shimanto
/--/--/--/--/-
Nyunokawa Formation
/--/--/--/--/-
Otonashigawa Group
/--/--/--/--/-
Muro Group
/--/--/--/--/-
[ Lower ]

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

Distribution: Nyukawa river - Mount Takadake, Shimoichi city, Yoshino county, Nara pref.; Mount Yunoyama, Gojo city, Nara prefecture
Fossils (Radiolarians): Archaeodictyomitr cf. praevenata, Dictyomitra cf. carpatica

Shiida et al. (1989) Geology of the Sanjogatake District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 100p. (in Japanese with English abstract 5p.)