| Group or Formation |
Period |
Notes |
| Allegheny Formation | Carboniferous | |
| Antietam Formation | Cambrian | |
| Aquia Formation | Paleogene | |
| Brightseat Formation | Paleogene | |
| Calvert Formation | Neogene | |
| Chatham Group/Gettysburg Formation | Triassic | |
| Chemung Formation | Devonian | |
| Chesapeake Group/Calvert Formation | Neogene | |
| Chesapeake/Choptank Formation | Neogene | |
| Chesapeake/St. Marys Formation | Neogene | |
| Clinton Group/Keefer Sandstone | Silurian | |
| Clinton/Rochester Shale | Silurian | |
| Clinton/Rose Hill Formation | Silurian | |
| Conemaugh Group | Carboniferous | |
| Dunkard Group/Greene Formation | Permian | |
| Foreknobs Formation | Devonian | |
| Greenland Gap Group/Foreknobs Formation | Devonian | |
| Jennings Formation | Devonian | |
| Aquia Formation | Paleogene | |
| Magothy Formation | Cretaceous | |
| Marcellus Formation | Devonian | |
| Matawan Formation | Cretaceous | |
| McKenzie Formation | Silurian | |
| Merchantville Formation | Cretaceous | |
| Mifflintown Formation | Silurian | |
| Monmouth Formation | Cretaceous | |
| Nanjemoy Formation | Paleogene | |
| Onondaga Formation | Devonian | |
| Pamlico Formation | | |
| Pamunkey Group/Aquia Formation | Paleogene | |
| Pamunkey/Brightseat Formation | Paleogene | |
| Pamunkey/Nanjemoy Formation | Paleogene | |
| Arundel Clay | Cretaceous | |
| Patapsco Formation | Cretaceous | |
| Patuxent Formation | Cretaceous | |
| Rockdale Run Formation | Ordovician | |
| Romney Formation | Devonian | |
| Severn Formation | Cretaceous | |
| St. Marys Formation | Neogene | |
| Stonehenge Limestone | Ordovician | |
| Talbot Formation | | |
| Tonoloway Limestone | Silurian | |
| Williamsport Sandstone | Silurian | |
| Wills Creek Limestone | Silurian | |
|
