A number of different strata are exposed in middle Tennessee, and the
fossils in each of them are unique. Therefore, if you know the stratum
exposed in the site where you are hunting, it makes identifying the fossils
much easier.
| Period | Group | Formation | Sites |
| Lower Mississippian | Fort Payne |
|
|
| Maury Shale |
|
||
| Upper Devonian | Chattanooga Shale |
|
|
| Lower Silurian | Brassfield Limestone | ||
| Upper Ordovician | Richmond Group |
|
|
| Upper Ordovician | Maysville Group | Liepers Formation |
|
| Middle Ordovician | Nashville Group | Catheys Formation |
|
| Bigby-Cannon Formation |
|
||
| Hermitage Formation |
|
||
| Stones River Group | Carters Limestone |
|
|
| Lebanon Limestone | |||
| Ridley Limestone | |||
| Pierce Limestone | |||
| Murfreesboro Limestone |