Geology for ELR FHR6 is based on British Geological Survey (BGS) low-resolution data sampled at 100 metre intervals along the ELR. The geology presented should not be treated as accurate or complete. Data marked with Ⓤ is classed as undifferentiated by the BGS.
| Mileage | Material | Deposit | Bedrock |
|---|---|---|---|
| 20M 1752y to 25M 0275y | Diamicton | Till | Pennine Lower Coal Measures Formation and South Wales Lower Coal Measures Formation Ⓤ |
| 25M 0275y to 25M 1155y | Pennine Lower Coal Measures Formation and South Wales Lower Coal Measures Formation Ⓤ | ||
| 25M 1155y to 25M 1705y | Diamicton | Till | Pennine Lower Coal Measures Formation and South Wales Lower Coal Measures Formation Ⓤ |
| 25M 1705y to 27M 0165y | Diamicton | Till | Millstone Grit Group - Mudstone, Siltstone and Sandstone |
| 27M 0165y to 30M 1241y | Millstone Grit Group - Mudstone, Siltstone and Sandstone |