Burlington Limestone  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Carboniferous
 ....Mississippian
 .....Lower Mississippian
 ......Osagian
 .......Burlington Limestone
RTIowa
 Kentucky
 Missouri
 Illinois
SNFrom Iowa to Kentucky. Added to Thesaurus in 1985.