Key: Pink and Purple
- Mainly Marine Stratified Sequences
- PP Pennsylvanian
- O3 Upper Ordovician (Cincinnatian)
- O2 Middle Ordovician (Mohawkian)
- O1, O1b, O1a Lower Ordovician (Canadian)
- O Ordovician
- lPz Lower Paleozoic
- OC Cambrian-Ordovician
- Eugeosynclinal Deposits
- DSe Devonian and Silurian
- SOe Silurian and Ordovician
- Oe Ordovician
- Ce Cambrian
- Volcanic Rocks
- Dv Devonian volcanic rocks
- DSe Devonian and Silurian
- Ov Ordovician volcanic rocks
- Cv Cambrian volcanic rocks
- Intrusive Rocks
- Pzg1 Lower Paleozoic granitic rocks
- Cg Cambrian granitic rocks