Kohachigagawa Formation

[ Top ] [ Japanese ]

Kohachigagawa Formation

Accretionary complex
Deposition (Limestone): early - middle Permian (Fusulinids)
Jurassic
Correlation: Funafuseyama Unit

Sedimentary facies: Marine
Lithofacies: Basalt pillow lava, Lava, Hyaloclastite, Tuff, Chert
Lithofacies (Minor): Limestone, Dolerite, Dolomite

Upper limit: Transitional (Gombo Formation), Unconformity (Nishikiyama Welded Tuff, Yamaguchi Gravel Bed)

Shirahone Complex (Takayama, Gifu pref.)
[ Upper ]
/--/--/--/--/-
Kohachigawa Formation
/--/--/--/--/-
[ Lower ]

Mino Belt (Kiso region)
[ Upper ]
/--/--/--/--/-
Hirayu Complex
/--/--/--/--/-
Shirahone Complex
/--/--/--/--/-
Sawando Complex
/--/--/--/--/-
Shimashima Complex
/--/--/--/--/-
Misogawa Complex
/--/--/--/--/-
Yabuhara Complex
/--/--/--/--/-
[ Lower ]

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

Distribution: Taki Town - Shioya town - Namaigawa river, Takayama city, Gifu pref.; Yamakuchitanigawa river, Nyukawa town, Takayama city, Gifu pref.
Fossils (Limestone): Fusulinids
Fossils (Chert): Radiolarians, Conodonts

Yamada et al. (1985) Geology of the Takayama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 111p. (in Japanese with English abstract 9p.)