Kozogawa Volcanic Rocks

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Kozogawa Volcanic Rocks Hattori et al., 1983

Type locality: Kozogawa river - Kametanigawa river, Ichihara, Oda city, Shimane prefecture
Volcanic rocks
early Miocene

Sedimentary facies (Upper, Minor): Subaqueous
Lithofacies (Top, Minor): Basalt - Andesite lapilli tuff, Tuff, Volcanic breccia
Lithofacies (Upper, Minor): Rhyolite lava
Lithofacies: Rhyolite - Dacite tuff, Lapilli tuff
Sedimentary structures: Graded bedding
Sedimentary structures (Rholite): Flow structure

Thickness: 150 m or thicker
Upper limit: Unconformity (Tsunozu Group)
Lower limit: Unconformity (Ijimi Granite)

Hata Formation (Oda, Shimane pref.)
[ Upper ]
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Kozogawa Volcanic Rocks
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[ Lower ]

southern Izumo, Shimane pref.
[ Upper ]
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Jinzai Formation
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Hikawa Formation
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Fujina Formation
-------~~~~~~~
Omori Formation
~~~~~~~~~~~~~~
Kuri Formation
'''''''/,,,,,,
Kawai Formation
~~~~~~~~~~~~~~
Hata Formation
~~~~~~~~~~~~~~
Sada Formation
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[ Lower ]

Kakeya caldera
[ Upper ]
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Hata Formation
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Ichihara - Jinryo - Takamatsuji - Komatsuji, 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.)