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Sakasegawa Group

• Coherent formation
• middle - late Eocene

• Sedimentary facies: Marine

• Lower limit: Conformity (Shimoshima Group)

------ 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.

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