Ozuchi Formation

[ Top ] [ Japanese ]

Ozuchi Formation

Accretionary complex
Deposition (Chert): middle - late Triassic (Radiolarians)
Deposition (Mudstone): Jurassic (Radiolarians)
Correlation: Maihara Formation, Ichinose Formation

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

Thickness: ca. 800 - 2,500 m
Upper limit: Transitional (Tamuragawa Formation)
Lower limit: Transitional (Tsuchiyama Formation)

Yasugawa Group
[ Upper ]
/--/--/--/--/-
Tamuragawa Formation
--------------
Ozuchi Formation
--------------
Tsuchiyama Formation
/--/--/--/--/-
[ Lower ]

Mino Belt (Yasu, Shiga pref.)
[ Upper ]
/--/--/--/--/-
Yasugawa Group
/--/--/--/--/-
[ Lower ]

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

Distribution: Yasugawa dam - Otowadani valley - Inoashidani valley - Miyamadani valley, Tsuchiyama town, Koka city, Shiga pref.; Kaigake, Hino city, Gamo county, Shiga pref.

Harayama et al. (1989) Geology of the Gozaishoyama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 145p. (in Japanese with English abstract 6p.)
Miyamura et al. (1981) Geology of the Kameyama District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 128p. (in Japanese with English abstract 9p.)