Ripley Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Cretaceous
 ....Upper Cretaceous
 .....Ripley Formation
RTKentucky
 Missouri
 Illinois
 Mississippi
 Alabama
 Georgia
 Tennessee
 Selma Group
SNIn Selma Group. Includes Coon Creek Tongue, Chiwapa Sandstone Member, McNairy Sand Member, Keownville Limestone Member. Alabama, Georgia, S Illinois, W Kentucky, SE Missouri, N and central Mississippi, and W Tennessee.