Shioyama Lava Member

[ Top ] [ Japanese ]

Shioyama Lava Member Kawabata and Shuto, 2000

Type locality: 380 m above sea level of Shippozan forest road, Toyonaka town, Mitoyo city, Kagawa prefecture
Volcanic rocks
Setouchi volcanic belt
Miocene

Lithofacies: Calc-alkaline series
Lithofacies: Andesite - Dacite lava (more than 2 flow units)
Lithofacies (A flow unit, Bottom): Flow foot breccia
Sedimentary structures: Columnar joints

Thickness (A flow unit): ca. 35 m
Thickness (A flow unit, Bottom): 10 m or thinner
Thickness: 250 m

Kokubudai Formation
[ Upper ]
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Maruyama Volcanic Rock Member
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Tsukumoyama Volcanic Rock Member
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Takinomiya Volcanic Rock Member
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Kitaura Volcanic Rock Member
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Inazumiyama Lava Member
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Shioyama Lava Member
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Sou Lava 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: Shippozan forest road, Toyonaka town, 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.)