Tsukumoyama Volcanic Rock Member

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Tsukumoyama Volcanic Rock Member Noda et al., 2017

Type locality: Mount Tsukumoyama, Kanonji city, Kagawa prefecture
Volcanic rocks
Setouchi volcanic belt
Miocene

Lithofacies: Calc-alkaline series
Lithofacies: Andesite breccia, Andesite - Dacite lava
Sedimentary structures (Minor): Columnar joints, Xenoliths

Source (Volcanic neck): Mount Tsukumoyama
Distribution (Volcanic neck, Diameter): ca. 450 m
Lower limit: Unconformity (Kan-onji Granite)

Kokubudai Formation
[ Upper ]
~~~~~~~~~~~~~~
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 ]
~~~~~~~~~~~~~~
Kokubudai Formation
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Higashioku Formation
~~~~~~~~~~~~~~
[ Lower ]

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

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

Distribution: Mount Tsukumoyama, Kanonji 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.)