Geology for ELR BWC 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 |
|---|---|---|---|
| 0M -009y to 1M 0715y | Diamicton | Till | Pennine Middle Coal Measures Formation and South Wales Middle Coal Measures Formation Ⓤ |
| 1M 0715y to 1M 0825y | Pennine Middle Coal Measures Formation and South Wales Middle Coal Measures Formation Ⓤ | ||
| 1M 0825y to 1M 1375y | Diamicton | Till | Pennine Middle Coal Measures Formation and South Wales Middle Coal Measures Formation Ⓤ |
| 1M 1375y to 1M 1485y | Diamicton | Till | |
| 1M 1485y to 2M 1265y | Diamicton | Till | Pennine Middle Coal Measures Formation and South Wales Middle Coal Measures Formation Ⓤ |
| 2M 1265y to 3M 0055y | Pennine Middle Coal Measures Formation and South Wales Middle Coal Measures Formation Ⓤ | ||
| 3M 0055y to 3M 0825y | Diamicton | Till | Pennine Middle Coal Measures Formation and South Wales Middle Coal Measures Formation Ⓤ |
| 3M 0825y to 4M 0055y | Pennine Middle Coal Measures Formation and South Wales Middle Coal Measures Formation Ⓤ | ||
| 4M 0055y to 4M 0605y | Diamicton | Till | Pennine Middle Coal Measures Formation and South Wales Middle Coal Measures Formation Ⓤ |
| 4M 0605y to 4M 1595y | Pennine Middle Coal Measures Formation and South Wales Middle Coal Measures Formation Ⓤ | ||
| 4M 1595y to 5M 0825y | Diamicton | Till | Pennine Middle Coal Measures Formation and South Wales Middle Coal Measures Formation Ⓤ |
| 5M 0825y to 5M 1265y | Sand | Blown Sand | Pennine Middle Coal Measures Formation and South Wales Middle Coal Measures Formation Ⓤ |
| 5M 1265y to 5M 1705y | Pennine Middle Coal Measures Formation and South Wales Middle Coal Measures Formation Ⓤ | ||
| 5M 1705y to 6M 0978y | Sand | Blown Sand | Pennine Middle Coal Measures Formation and South Wales Middle Coal Measures Formation Ⓤ |