Fukuregi Formation

Coherent formation
middle Eocene
Correlation: Ojima Formation

Sedimentary facies: Marine
Depth of water: Shallow

Upper limit: Conformity (Shikiyama Formation)

Shimoshima Group
[ Upper ]
--------------
Toishi Formation
--------------
Shikiyama Formation
--------------
Fukuregi Formation
?--?--?--?--?-
[ Lower ]

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

Distribution: Amakusa-Shimoshima island, Amakusa city, Kumamoto pref.; Gesu island, Ushibuka town, Amakusa city, Kumamoto pref.
Fossils: Foraminifera, Calcareous nannofossils, Shellfishes

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