Geology for ELR RAC 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 |
|---|---|---|---|
| 125M 1176y to 125M 1485y | Clay, Silt and Sand | Alluvium | Pennine Middle Coal Measures Formation and South Wales Middle Coal Measures Formation Ⓤ |
| 125M 1485y to 126M 0715y | Pennine Middle Coal Measures Formation and South Wales Middle Coal Measures Formation Ⓤ | ||
| 126M 0715y to 126M 1045y | Zechstein Group - Dolomitised Limestone and Dolomite | ||
| 126M 1045y to 126M 1155y | Permian Rocks Ⓤ - Sandstone and Conglomerate, Interbedded | ||
| 126M 1155y to 127M 0385y | Clay, Silt and Sand | Alluvium | Permian Rocks Ⓤ - Sandstone and Conglomerate, Interbedded |
| 127M 0385y to 128M 0165y | Sand and Gravel | Glacial Sand and Gravel | Permian Rocks Ⓤ - Sandstone and Conglomerate, Interbedded |
| 128M 0165y to 128M 0605y | Sand and Gravel | Glacial Sand and Gravel | Zechstein Group - Dolomitised Limestone and Dolomite |
| 128M 0605y to 128M 0825y | Clay, Silt and Sand | Alluvium | Zechstein Group - Dolomitised Limestone and Dolomite |
| 128M 0825y to 129M 0385y | Clay, Silt and Sand | Alluvium | Permian Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 129M 0385y to 129M 1265y | Clay, Silt and Sand | Alluvium | Permian Rocks Ⓤ - Sandstone and Conglomerate, Interbedded |
| 129M 1265y to 130M 0495y | Clay, Silt and Sand | Alluvium | Permian Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 130M 0495y to 131M 0715y | Permian Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 131M 0715y to 133M 1045y | Zechstein Group - Dolomitised Limestone and Dolomite | ||
| 133M 1045y to 134M 0605y | Permian Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 134M 0605y to 135M 1595y | Permian Rocks Ⓤ - Sandstone and Conglomerate, Interbedded | ||
| 135M 1595y to 136M 0385y | Permian Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 136M 0385y to 136M 1045y | Zechstein Group - Dolomitised Limestone and Dolomite | ||
| 136M 1045y to 136M 1155y | Pennine Middle Coal Measures Formation and South Wales Middle Coal Measures Formation Ⓤ | ||
| 136M 1155y to 136M 1477y | Zechstein Group - Dolomitised Limestone and Dolomite |