H4 Dacite Member

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H4 Dacite Member

Type locality: Kubi - Okitomo, Yutaka town, Kure city, Hiroshima prefecture
Volcanic rocks
Late Cretaceous
Correlation: Tado Volcanic Member, Kubi Formation

Lithofacies: Dacite welded crystalline tuff
Lithofacies (Minor): Rhyolite welded tuff
Lithofacies (Basal): Andesite conglomerate

Thickness: ca. 400 m or thicker
Distribution (East - West): ca. 21 km
Upper limit: Conformity (H5 Rhyolite Member)
Lower limit: Conformity (H3 Andesite Member), Unconformity (Okitomo Formation)

Haigamine Formation
[ Upper ]
~~~~~~~~~~~~~~
H8 Dacite Member
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H7 Rhyolite Member
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H6 Dacite Member
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H5 Rhyolite Member
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H4 Dacite Member
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H3 Andesite Member
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H2 Rhyolite Member
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H1 Breccia Member
~~~~~~~~~~~~~~
[ Lower ]

Takada Rhyolites (Kure, Hiroshima pref.)
[ Upper ]
~~~~~~~~~~~~~~
Norosan Welded Tuff
~~~~~~~~~~~~~~
Haigamine Formation
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Osakikamijimacity, Toyota county, Hiroshima pref.; Osakishimojima island - Toyoshima island - Kamikamagarijima island - Mikadojima island - Ocho - Kubi - Kie, Kure city, Hiroshima pref.

Matsuura (2001) Geology of the Mitsu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 58p. (in Japanese with English abstract 4p.)