See detailed information for ELR CRL
⚠️ Geology shown below is based on British Geological Survey (BGS) low-resolution data sampled at 100 metre intervals along the ELR. The geology relative to the mileages should not be treated as accurate or complete. Data marked with Ⓤ is classed as undifferentiated by the BGS.
| Mileage | Material | Deposit | Bedrock |
|---|---|---|---|
| 271M 0162y to 271M 0935y | Ashgill Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 271M 0935y to 273M 0935y | Arenig Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 273M 0935y to 274M 0385y | Caradoc Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 274M 0385y to 274M 0605y | Clay, Silt and Sand | Alluvium | Caradoc Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 274M 0605y to 274M 0715y | Clay, Silt and Sand | Alluvium | Arenig Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 274M 0715y to 274M 1155y | Arenig Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 274M 1155y to 275M 0165y | Upper Cambrian, Including Tremadoc - Mudstone, Siltstone and Sandstone | ||
| 275M 0165y to 275M 1155y | Unnamed Extrusive Rocks, Ordovician - Mafic Lava and Mafic Tuff | ||
| 275M 1155y to 275M 1705y | Arenig Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 275M 1705y to 276M 0935y | Unnamed Extrusive Rocks, Ordovician - Felsic Lava | ||
| 276M 0935y to 277M 0825y | Upper Cambrian, Including Tremadoc - Mudstone, Siltstone and Sandstone | ||
| 277M 0825y to 278M 0275y | Lower Cambrian Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 278M 0275y to 278M 1375y | Unnamed Extrusive Rocks, Neoproterozoic - Felsic Tuff | ||
| 278M 1375y to 279M 0385y | Arenig Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 279M 0385y to 279M 1375y | Llanvirn Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 279M 1375y to 280M 0275y | Arenig Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 280M 0275y to 280M 0495y | Clay, Silt and Sand | Alluvium | Arenig Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 280M 0495y to 280M 1265y | Clay, Silt and Sand | Alluvium | Upper Cambrian, Including Tremadoc - Mudstone, Siltstone and Sandstone |
| 280M 1265y to 280M 1375y | Upper Cambrian, Including Tremadoc - Mudstone, Siltstone and Sandstone | ||
| 280M 1375y to 281M 1278y | Arenig Rocks Ⓤ - Mudstone, Siltstone and Sandstone |