Waldron Shale  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Silurian
 ....Middle Silurian
 .....Waldron Shale
RTKentucky
 Indiana
 Tennessee
SNA gray or greenish-gray calcareous shale with occasional thin beds of limestone or argillaceous shale. S Indiana, W central Kentucky, and central Tennessee.