Litostratigrafie
Devon
| Famen | Chattanooga shale (Givet – Famen) |
| Frasn | Chattanooga shale (Givet – Famen) |
| Givet | Chattanooga shale (Givet – Famen) |
Ordovik
| Sandbian | Little Oak formation (Darriwil – Sandbian) Pratt Ferry formation (Darriwil – Sandbian) |
| Darriwil | Little Oak formation (Darriwil – Sandbian) Pratt Ferry formation (Darriwil – Sandbian) |
Kambrium
| Kambrium stage 4 | Weisner formation (Kambrium stage 3 – Kambrium stage 4) |
| Kambrium stage 3 | Wilson Ridge formation Nichols shale Weisner formation (Kambrium stage 3 – Kambrium stage 4) Cochran formation |