Geology for ELR WHM 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 |
|---|---|---|---|
| 122M 0595y to 122M 0715y | Triassic Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 122M 0715y to 122M 1045y | Clay, Silt and Sand | Alluvium | Triassic Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 122M 1045y to 123M 0825y | Clay, Silt and Sand | Alluvium | Triassic Rocks Ⓤ - Sandstone and Conglomerate, Interbedded |
| 123M 0825y to 124M 0385y | Clay, Silt and Sand | Alluvium | Pennine Lower Coal Measures Formation and South Wales Lower Coal Measures Formation Ⓤ |
| 124M 0385y to 124M 0825y | Sand and Gravel | River Terrace Deposits Ⓤ | Pennine Lower Coal Measures Formation and South Wales Lower Coal Measures Formation Ⓤ |
| 124M 0825y to 125M 0379y | Clay, Silt and Sand | Alluvium | Pennine Lower Coal Measures Formation and South Wales Lower Coal Measures Formation Ⓤ |