| State | Pennsylvania |
|---|---|
| Name | Patapsco(?) Formation |
| Geologic age | Cretaceous |
| Lithologic constituents |
Major
Unconsolidated > Fine-detrital > ClayIntensely colored, variegated, ferruginous clay
Minor
Unconsolidated > Coarse-detrital > Sand (Bed)
|
| References | Berg, T.M., Edmunds, W.E., Geyer, A.R., and others, compilers, 1980, Geologic map of Pennsylvania: Pennsylvania Geological Survey, 4th ser., Map 1, 2nd ed., 3 sheets, scale 1:250,000.Pennsylvania Bureau of Topographic and Geologic Survey, Department of Conservation and Natural Resources, Miles, C.E., and Whitfield, T.G., compilers, 2001, Bedrock Geology of Pennsylvania, edition: 1.0, digital map, scale 1:250,000. |
| NGMDB product | |
| Counties | Montgomery |