McKenzie Formation  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Paleozoic
 ...Silurian
 ....Middle Silurian
 .....McKenzie Formation
RTVirginia
 Pennsylvania
 Maryland
 West Virginia
SNIn Maryland, it includes Rabble Run Sandstone Member. Underlies Bloomsburg Formation and overlies Rochester Formation. W Maryland, central Pennsylvania, N Virginia, and NE West Virginia.