Yugakaigawa Volcanic Rocks

Yugakaigawa Volcanic Rocks Hattori et al., 1983

Type locality: Yugakaigawa river, Misato city, Ochi county, Shimane prefecture
Volcanic rocks
Eocene
Intruded by: Ijimi Granite, Makihara Complex

Lithofacies (Upper): Dacite tuff, Tuff breccia
Lithofacies (Upper, Minor): Tuff, Tuffaceous mudstone
Lithofacies (Lower): Rhyolitic dacite welded tuff

Thickness: 600 m or thicker
Upper limit: Unconformity (Toburodani Formation, Kawai Formation)

Takayama Group
[ North ]
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Hakami Volcanic Rocks
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Yugakaigawa Volcanic Rocks
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Tsuremizu Volcanic Rocks
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Takayama Volcanic Rocks
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[ South ]

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

Distribution: Yugakaigawa river - Makihara - Nishidagawa river, Misato city, Ochi county, Shimane pref.; Nohata - Imohara - Okuhata, Oda city, Shimane pref.

Hattori et al. (1983) Geology of the Sambesan District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 168p. (in Japanese with English abstract 7p.)