Fujioka Formation

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Fujioka Formation (Nakayama, 1987) Nakashima et al., 2021

Invalid synonym: Fujioka Member, lower Mizuno Member, Tamomi Formation

Type locality: Fukami Town, Toyota city, Aichi prefecture
Coherent formation
Fluvio-lacustrine basin including Lake Tokai
late Miocene - early Pliocene (6.2 - 5.0 Ma)
Correlation: Mashizume Formation

Sedimentary facies: Fluvial
Sedimentary facies: Alluvial fan at the margins of a structural sedimentary basin
Sedimentary facies: Channel, Bar
Lithofacies: Gravels
Sedimentary structures: Channel structures, Cross stratification

Thickness: 20 - 60 m
Upper limit: Top of Togo Tephra
Upper limit: Conformity (Yadagawa Formation), Unconformity (Koromo Formation, Koshido Formation)
Lowerl imit: Conformity, partly unconformity (Seto Porcelain Clay Formation), Unconformity (Shinano Formation, Granite)

Tokai Group (Nagoya, Aichi pref.)
[ Upper ]
?--?--?--?--?-
Yadagawa Formation
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Fujioka Formation
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Seto Porcelain Clay Formation
~~~~~~~~~~~~~~
[ Lower ]

Second Setouchi Supergroup (Mie pref. - Aichi pref.)
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Tokai Group
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[ Upper ]
~~~~~~~~~~~~~~
Second Setouchi Supergroup
?--?--?--?--?-
First Setouchi Supergroup
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Fukami Town, Toyota city, Aichi pref.; Yagiko, Nagakute city, Aichi pref.; Iwafuji town - Komenoki town, Nisshin city, Aichi pref.; Tamomi town - Higashihomi town - Kano town - Nishinakayama town - Shidare town - Nishihirose town - Higashihirose town - Kanpachi town - Kamitaka town - Yagusa town, Toyota city, Aichi pref.
Fossils (Plants): Fagus sp., Salix sp., Zelkova sp.
Tephra: Togo Tephra, Nishiibara Tephra

Nakashima et al. (2021) Geology of the Toyota District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 91p. (in Japanese with English abstract 4p.)
Yamasaki et al. (2020) Geology of the Akechi District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, AIST, 120p. (in Japanese with English abstract 5p.)