Cohansey Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Neogene
 ....Cohansey Formation
RTPliocene
 Miocene
 Pennsylvania
 Maryland
 Delaware
 New Jersey
SNOverlies Kirkwood Formation, underlies Beacon Hill Gravel. Indexed with ages as applicable. Added to Thesaurus in 1989.