Ichishi Group

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Ichishi Group Ogawa, 1919

Coherent formation
Miocene sediments related to the paleo Setouchi inner sea
early Miocene

Sedimentary facies: Terrestrial, Marine
Water temperature (Upper): Subtropical (Foraminifera)
Depth of water (Upper): Upper bathyal (Shellfishes)
Lithofacies: Mudstone, Siltstone, Sandstone, Conglomerate
Lithofacies (Minor): Ryolitic tuff

Thickness: ca. 1,500 m
Upper limit: Unconformity (Tokai Group)
Lower limit: Unconformity (Ryoke Metamorphic Rocks, Upper Formation)

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
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[ Lower ]

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

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

Distribution: Ichishi hills - Ano town - Geino 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.)