Ukan Formation

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Ukan Formation Fujiwara et al., 2001

Type locality: Ukan, Ukan town, Takahashi city, Okayama prefecture
Coherent formation
early - middle Miocene (Shellfishes, Foraminifera; 15.5 FT)
Correlation: Bihoku Group, Katsuta Group

Sedimentary facies: Marine

Lower limit: Unconformity (Kibi Group)

Ukan Formation
[ Upper ]
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Tsuneyama Siltstone Member
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Azechi Sandstone and Conglomerate Member
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Shimoyokomi Sandstone and Conglomerate Member
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Yamagata Muddy Sandstone Member
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Suzuoka Conglomerate Member
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[ Lower ]

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

Distribution: Ukan, Ukan town, Takahashi city, Okayama pref.
Fossils (Shellfishes): Geloina spp., Anadara (Hataiarca) kakehataensis, Crassostrea gravitesta, Hiatula minoensis, Vicarya spp., Vicaryella ishiiana, Tateiwaia tateiwai
Fossils (Foraminifera): Operculina complanata japonica

Suzuki et al. (2009) Jour. Geol. Soc. Japan, vol.115, Supplement, pp.139-151 DOI