Geology for ELR KBF 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 |
|---|---|---|---|
| 11M 0075y to 11M 0165y | Diamicton | Till | Zechstein Group - Dolomitised Limestone and Dolomite |
| 11M 0165y to 11M 1595y | Zechstein Group - Dolomitised Limestone and Dolomite | ||
| 11M 1595y to 13M 0275y | Diamicton | Till | Zechstein Group - Dolomitised Limestone and Dolomite |
| 13M 0275y to 13M 1155y | Diamicton | Till | Pennine Middle Coal Measures Formation and South Wales Middle Coal Measures Formation Ⓤ |
| 13M 1155y to 14M 0605y | Clay, Silt and Sand | Alluvium | Pennine Middle Coal Measures Formation and South Wales Middle Coal Measures Formation Ⓤ |
| 14M 0605y to 14M 1265y | Pennine Middle Coal Measures Formation and South Wales Middle Coal Measures Formation Ⓤ | ||
| 14M 1265y to 14M 1485y | Zechstein Group - Dolomitised Limestone and Dolomite | ||
| 14M 1485y to 15M 0119y | Sand and Gravel | Glacial Sand and Gravel | Zechstein Group - Dolomitised Limestone and Dolomite |