Takikubo Formation

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Takikubo Formation

Type locality: Takikubo, Higashimiyoshi city, Miyoshi county, Tokushima prefecture
Coherent formation
Izumi sedimentary basin
Forearc basin associated with strike-slip fault related to Median Tectonic Line
Late Cretaceous
Interfingered: Hiketa Formation, Shiroyama Formation

Lithofacies: Interbedded sanstone and mudstone, Felsic tuff
Sedimentary structures: Graded bedding, Sole marks, Slump structure
Paleocurrent: from Northeast to Southwest
Paleocurrent (Minor): from Northwest to Southeast

Takikubo Formation
[ Upper ]
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Unpenji Sandstone Member
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Ebisukui Mudstone Member
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Tanono Sandstone Member
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Minoura Sandstone and Mudstone Member
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[ Lower ]

Main facies (Sanuki mountains, Tokushima pref.)
[ Upper ]
'''''''/,,,,,,
Bandodani Formation
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Higaidani Formation
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Horita Formation
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Takikubo Formation
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[ Lower ]

Izumi Group
[ North ]
~~~~~~~~~~~~~~
Northern marginal facies
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Main facies
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Southern facies
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[ South ]

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

Distribution: Takikubo, Higashimiyoshi city, Miyoshi county, Tokushima 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.)
Kikuchi and Kotake (2013) Jour. Geol. Soc. Japan, vol.119, no.9, pp.613-629 DOI