Porters Creek Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Cenozoic
 ...Paleogene
 ....Paleocene
 .....Porters Creek Formation
RTKentucky
 Missouri
 Illinois
 Mississippi
 Alabama
 Tennessee
 Midway Group
SNIn Midway Group. SW Alabama, SW Illinois, W Kentucky, E Mississippi, SE Missouri and W Tennessee. Added to Thesaurus in 1989.