Oniike Formation

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Oniike Formation

Type locality: Oniike, Amakusa-Shimoshima island, Amakusa city, Kumamoto prefecture
Coherent formation
middle - late Eocene

Sedimentary facies: Marine
Depth of water: Bathyal
Lithofacies: Mudstone

Lower limit: Conformity (Futae Formation)

Sakasegawa Group
[ Upper ]
?--?--?--?--?-
Oniike Formation
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Futae Formation
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Sakasegawa Formation
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Itchoda Formation
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[ Lower ]

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

Distribution: Hikizaka - Oniike, Amakusa-Shimoshima island, Amakusa city, Kumamoto pref.; Suguchi, Ushibuka town, Amakusa city, Kumamoto pref.
Fossils: Foraminifera, Calcareous nannofossils, Shellfishes
Fossils (Pteropods): Limacina canadaensis, Limacina lotschi, Limacina cf. augustana, Creseis hastata, Creseis simplex, Praehyalocylis annulata

Ando et al. (2009) Jour. Geol. Soc. Japan, vol.115, no.4, pp.187-190 DOI