Inyan Kara Group  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Cretaceous
 ....Lower Cretaceous
 .....Inyan Kara Group
RTWyoming
 North Dakota
 South Dakota
 Fall River Formation
 Lakota Formation
SNNE Wyoming, North Dakota and W South Dakota. Added to Thesaurus in 1985.