Kobiwako Group  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Kobiwako Group
RTPliocene
 Pleistocene
 Honshu
 Japan
SNIncludes Iga Formation (Pliocene) and Katata Formation (Pleistocene). Indexed with ages as applicable. Added to Thesaurus in 1989.