Ishido Volcaniclastic Rock Member

[ Top ] [ Japanese ]

Ishido Volcaniclastic Rock Member Kawabata and Shuto, 2000

Type locality: 150 m above sea level of Ishido, Hiji, Takase town, Mitoyo city, Kagawa prefecture
Volcanic rocks
Setouchi volcanic belt
Miocene

Lithofacies: Calc-alkaline series
Lithofacies: Pyroclastic flow deposit, Subaqueous reworked pyroclastic flow deposits
Lithofacies: Rhyolite tuff breccia, Tuff
Sedimentary structures: Slump structures

Source: Mount Shioyama
Thickness: ca. 110 m
Upper limit: Conformity (Sou Lava Member)
Lower limit: Unconformity (Kan-onji Granite)

Higashioku Formation
[ Upper ]
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Ishido Volcaniclastic Rock Member
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[ Lower ]

Sanuki Group
[ Upper ]
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Kokubudai Formation
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Higashioku Formation
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[ Lower ]

Setouchi Volcanic Rocks (Sanuki, Kagawa pref.)
[ Upper ]
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Sanuki Group
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[ Lower ]

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

Distribution: Shippo mountains - Ishido - Shimizu - Shimotakano - Mount Shioyama, Mitoyo city, Kagawa pref.

Noda et al. (2017) Geology of the Kan-onji District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 96p. (in Japanese with English abstract 4p.)