Yachikusa Complex

[ Top ] [ Japanese ]

Yachikusa Complex Ozaki et al., 1995

Type locality: Shimoseka, Ichikawa city, Kanzaki county, Hyogo prefecture
Accretionary complex
Deposition (Shale): Late Triassic - Early Jurassic (Radiolarians)
Accretion: Jurassic

Sedimentary facies: Marine
Lithofacies: Mélange facies
Matrix: Shale
Exotic blocks (Crusts): Sandstone, Chert, Basalt lava, Pyroclastic rocks
Lithofacies (Minor): Interbedded sandstone and shale

Thickness: ca. 650 - 1,500 m
Upper limit: Unconformity (Okawachi Formation)

Tamba Belt (Ikuno, Hyogo pref.)
[ Upper ]
/--/--/--/--/-
Yachikusa Complex
/--/--/--/--/-
Wakai Complex
/--/--/--/--/-
Kochi Complex
/--/--/--/--/-
Okazaki Complex
/--/--/--/--/-
[ Lower ]

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

Distribution: Shimoseka, Ichikawa city, Kanzaki county, Hyogo pref.; Fukusaki city, Kanzaki county, Hyogo pref.; Kasai city, Hyogo pref.
Fossils (Radiolarians): Canoptum sp.

Yoshikawa et al. (2005) Geology of the Ikuno District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 48p. (in Japanese with English abstract 3p.)
Ozaki et al. (1995) Geology of the Hojo District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 101p. (in Japanese with English abstract 6p.)