Geology for ELR PEM 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 |
|---|---|---|---|
| 258M 1444y to 260M 0055y | Clay, Silt and Sand | Alluvium | Llanvirn Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 260M 0055y to 260M 0275y | Llanvirn Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 260M 0275y to 261M 1045y | Clay, Silt and Sand | Alluvium | Llanvirn Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 261M 1045y to 261M 1375y | Llanvirn Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 261M 1375y to 262M 1045y | Clay, Silt and Sand | Alluvium | Llanvirn Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 262M 1045y to 263M 0055y | Llanvirn Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 263M 0055y to 264M 0165y | Ashgill Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 264M 0165y to 264M 0715y | Llandovery Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 264M 0715y to 264M 1155y | Ashgill Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 264M 1155y to 265M 0275y | Llandovery Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 265M 0275y to 266M 1705y | Pridoli Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 266M 1705y to 267M 0055y | Diamicton | Till | Pridoli Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 267M 0055y to 267M 0605y | Diamicton | Till | Dinantian Rocks Ⓤ - Limestone with Subordinate Sandstone and Argillaceous Rocks |
| 267M 0605y to 267M 0715y | Millstone Grit Group - Mudstone, Siltstone and Sandstone | ||
| 267M 0715y to 267M 1375y | Diamicton | Till | Millstone Grit Group - Mudstone, Siltstone and Sandstone |
| 267M 1375y to 268M 0385y | Millstone Grit Group - Mudstone, Siltstone and Sandstone | ||
| 268M 0385y to 268M 1045y | Diamicton | Till | Millstone Grit Group - Mudstone, Siltstone and Sandstone |
| 268M 1045y to 268M 1155y | Diamicton | Till | Pennine Lower Coal Measures Formation and South Wales Lower Coal Measures Formation Ⓤ |
| 268M 1155y to 268M 1705y | Pennine Lower Coal Measures Formation and South Wales Lower Coal Measures Formation Ⓤ | ||
| 268M 1705y to 271M 0935y | Pennine Middle Coal Measures Formation and South Wales Middle Coal Measures Formation Ⓤ | ||
| 271M 0935y to 272M 1375y | Pennine Lower Coal Measures Formation and South Wales Lower Coal Measures Formation Ⓤ | ||
| 272M 1375y to 274M 1045y | Millstone Grit Group - Mudstone, Siltstone and Sandstone | ||
| 274M 1045y to 274M 1485y | Dinantian Rocks Ⓤ - Limestone with Subordinate Sandstone and Argillaceous Rocks | ||
| 274M 1485y to 275M 0055y | Clay, Silt and Sand | Alluvium | Dinantian Rocks Ⓤ - Limestone with Subordinate Sandstone and Argillaceous Rocks |
| 275M 0055y to 275M 0715y | Clay, Silt and Sand | Alluvium | Upper Devonian Rocks Ⓤ - Sandstone and Conglomerate, Interbedded |
| 275M 0715y to 275M 1705y | Upper Devonian Rocks Ⓤ - Sandstone and Conglomerate, Interbedded | ||
| 275M 1705y to 284M 0495y | Dinantian Rocks Ⓤ - Limestone with Subordinate Sandstone and Argillaceous Rocks | ||
| 284M 0495y to 284M 0605y | |||
| 284M 0605y to 284M 1265y | Dinantian Rocks Ⓤ - Limestone with Subordinate Sandstone and Argillaceous Rocks | ||
| 284M 1265y to 285M 0275y | Lower Devonian Rocks Ⓤ - Sandstone and Conglomerate, Interbedded | ||
| 285M 0275y to 285M 0825y | Pridoli Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 285M 0825y to 286M 0677y | Dinantian Rocks Ⓤ - Limestone with Subordinate Sandstone and Argillaceous Rocks |