| Ledger Formation | |
|---|---|
| Stratigraphic range: Cambrian | |
 Sample of Ledger Formation from West York, Pennsylvania | |
| Type | Formation |
| Sub-units | Lower dolomite member, Willis Run Member, upper dolomite member |
| Overlies | Kinzers Formation |
| Lithology | |
| Primary | dolomite |
| Location | |
| Region | Pennsylvania |
| Country | United States |
| Extent | Pennsylvania, Maryland, Virginia |
| Type section | |
| Named by | Stose, G.W., and Jonas, A.I.[1] |
The Ledger Formation or Ledger Dolomite is a geologic formation in Pennsylvania, United States.
The Ledger is described as light-gray, locally mottled, massive, pure, coarsely crystalline dolomite. It may be siliceous in the middle part.[2]