Mukugawa Complex

Invalid synonym: Hosaka Formation, Iwase Formation

Type locality: Mukugawa, Imazu town, Takashima city, Shiga prefecture
Accretionary complex
Deposition (Chert): Late Triassic, Early - Late Jurassic (Conodonts, Radiolarians)
Deposition (Siliceous mudstone): Middle Jurassic (Radiolarians)
Correlation: Arihara Complex, Tsurugaoka Complex, Hisasaka Complex, Sasae Complex

Sedimentary facies: Marine
LithofaciesMélange facies, Coherent facies (Chert-clastic sequence)
Matrix: Mudstone
Exotic blocks (Crusts): Chert, Sandstone
Lithofacies (Coherent facies): Chert
Lithofacies (Minor, Coherent facies): Siliceous claystone, Mudstone

Upper limit: Bottom of the greenstone bed
Upper limit: Thrust fault (Kochi Complex)
Lower limit: Thrust fault (Furuya Complex)

Tamba Belt (Wakasa, Fukui pref.)
[ Upper ]
/--/--/--/--/-
Tada Complex
/--/--/--/--/-
Shimonegori Complex
/--/--/--/--/-
Kochi Complex
/--/--/--/--/-
Mukugawa Complex
/--/--/--/--/-
Furuya Complex
/--/--/--/--/-
Yuragawa Complex
/--/--/--/--/-
[ Lower ]

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

Distribution: Mukugawa - Hosaka - Amasugawa - Mount Hakodateyama, Imazu town, Takashima city, Shiga pref.; Kijiyama - Aso - Arakawa, Kuchiki, Takashima city, Shiga pref.; Tanasho, Oi city, Oi county, , Fukui pref.
Fossils (Conodonts): Epigondolella bidentata, Epigondolella postera
Fossils (Radiolarians): Archaeodictyomitra? amabilis, Archaeodictyomitra? mirabilis, Cytocapsa cf. mastoidea, Eucyrtidiellum sp., Hsuum sp., Parahsuum sp., Parvicingula sp., Protunuma sp., Sethocapsa? sp., Stichocapsa cf. japonica, Syringocapsa sp., Tranhsuum maxwelli, Tricolocapsa cf. plicarum, Wrangellium? sp.

Nakae and Yoshioka (1998) Geology of the Kumagawa District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 71p. (in Japanese with English abstract 4p.)