Kaisaka Member

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Kaisaka Member Kishida and Wadatsumi, 1967

Type locality: Lake Honguike, Kamigori city, Ako county, Hyogo prefecture
Type locality (not observable): Kaisaka - Shinkakiuchi?, Kamigori city, Ako county, Hyogo prefecture
Volcanic rocks
Late Cretaceous

Lithofacies (Upper): Andesite - Dacite pyroclastic rocks
Lithofacies (Upper, Minor): Welded tuff
Lithofacies (Middle): Andesite aa lava
Lithofacies (Lower): Andesite tuff breccia
Sedimentary structures (Middle): Platy joints, Columnar joint

Upper limit: Abut unconformity (Shimobata Member)

Tsurukamekabu Formation
[ Upper ]
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Shimobata Member
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Kaisaka Member
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[ Lower ]

Aioi Group (Hyogo pref. - Okayama pref.)
[ Upper ]
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Ako Formation
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Tsurukamejobu Formation
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Tsurukamekabu Formation
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Kamigorijobu Formation
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Kamigorikabu Formation
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[ Lower ]

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

Distribution: Kaisaka - Shinkakiuchi? - Lake Honguike - Asahi mine - Mount Minozan, Kamigori city, Ako county, Hyogo pref.; Nishishinjuku, Sayo city, Sayo county, Hyogo pref.

Igi and Wadatsumi (1980) Geology of the Kamigori District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 74p. (in Japanese with English abstract 4p.)