Lithostratigraphy
Carboniferous
Devonian
| Famennian | Montfort formation |
| Frasnian | Grands Breux formation |
| Givetian | Hanonet formation (Eifelian – Givetian) |
| Eifelian | Hanonet formation (Eifelian – Givetian) |
| Emsian | Longlier formation (Pragian – ?Emsian) |
| Pragian | Longlier formation (Pragian – ?Emsian) |