Takamizuyama Unit

[ Top ] [ Japanese ]

Takamizuyama Unit Ozawa, 1975

Accretionary complex
Accretion: Jurassic

Sedimentary facies: Marine
Lithofacies: Chert, Gravel-bearing mudstone, Mafic volcanic rocks

Thickness: 1,000 m or thicker

Southern Chichibu Belt (western Ome, Tokyo)
[ Upper ]
/--/--/--/--/-
Takamizuyama Unit
/--/--/--/--/-
Fukazawa Unit
/--/--/--/--/-
[ Lower ]

Chichibu Belt
[ Upper ]
/--/--/--/--/-
Kurosegawa Belt
/--/--/--/--/-
Northern Chichibu Belt
/--/--/--/--/-
Southern Chichibu Belt
/--/--/--/--/-
[ Lower ]

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

Distribution: Mount Iwatakeishiyama - Nariki river, Ome city, Tokyo
Fossils (Radiolarians): Foremanina sp., Hsuum sp., Staurolonche sp., Tricolocapsa sp.

Sakai (1987) Geology of the Itsukaichi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 75p. (in Japanese with English abstract 5p.)