Oi Formation

[ Top ] [ Japanese ]

Oi Formation Yamada, 1958

Coherent formation
Miocene sediments related to the paleo Setouchi inner sea
early Miocene
Correlation: Chikusa Formation

Sedimentary facies: Marine
Water temperature (Upper): Subtropical (Foraminifera)
Depth of water (Upper): Upper bathyal (Shellfishes)

Upper limit: Conformity (Katada Formation)
Lower limit: Conformity (Haze Formation)

Oi Formation (Main part)
[ Upper ]
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Mitsugano Tuffaceous Siltstone and Sandstone Member
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Iedokoro Sandstone Member
~~~~~~~~~~~~~~
[ Lower ]

Oi Formation (Marginal part)
[ Upper ]
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Mitsugano Tuffaceous Siltstone and Sandstone Member
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Ichiba Sandstone and Siltstone Member
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Kusawa Sandstone and Siltstone Member
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Oshida Conglomerate Member
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Mukodani Conglomerate Member
~~~~~~~~~~~~~~
[ Lower ]

Ichishi Group
[ Upper ]
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Katada Formation
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Oi Formation
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Ieki Formation
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Haze Formation
~~~~~~~~~~~~~~
[ Lower ]

First Setouchi Supergroup (Ichishi, Mie pref.)
[ Upper ]
~~~~~~~~~~~~~~
Ichishi Group
~~~~~~~~~~~~~~
[ Lower ]

[ Upper ]
~~~~~~~~~~~~~~
Second Setouchi Supergroup
?--?--?--?--?-
First Setouchi Supergroup
~~~~~~~~~~~~~~
[ Lower ]

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

Distribution: Mitsugano, Hakusan town, Tsu city, Mie pref.

Oshida et al. (2018) Jour. Geol. Soc. Japan, vol.124, no.11, pp.919-933 DOI
Yoshida et al. (1995) Geology of the Tsu-Seibu District, Quadrangle Series, Scale 1:50,000, Geological Survey of Japan, 136p. (in Japanese with English abstract 6p.)