Yakeo Formation

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Yakeo Formation (Saito, 1962) Ueki and Mitusio, 1998

Invalid synonym: Yakeotoge Gravels

Type locality: Yakeo, Kawahigashi, Manno city, Nakatado county, Kagawa prefecture
Coherent formation
early Pleistocene, Calabrian
Contemporaneous heterotopic facies: Koda Formation

Sedimentary facies: Fluvial
Lithofacies: Gravels
Lithofacies (Minor): Silt

Thickness: 70 - 110 m
Upper limit: Unconformity (Higher and Middle Terrace Deposits)
Lower limit: Unconformity (Koda Formation, Saita Formation, Shiroyama Formation, Tanono Sandstone Member, Kan-onji Granite)

Mitoyo Group
[ Upper ]
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Takase Formation
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Yakeo Formation
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Koda Formation
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Saita Formation
~~~~~~~~~~~~~~
[ Lower ]

Sakaide lowland, Kagawa pref.
[ Upper ]
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Ayagawa Formation
~~~~~~~~~~~~~~
Sakaide Formation
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Honmachi Formation
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Mitoyo Group
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Yakeo - Yamawaki - Maeyama, Manno city, Nakatado county, Kagawa pref.; Uchinono - Awai town - Ariki - Fukudahara, Kanonji city, Kagawa pref.; Kochi - Tsuji - Nagano - Motoshino - Togawa, Mitoyo city, Kagawa pref.
Fossils (Plants): Cyclocarya sp. (Nuts), Metasequoia sp. (Cones)
Tephra: Motoshino

Noda et al. (2021) Geology of the Ikeda District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 150p. (in Japanese with English abstract 5p.)
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.)