See detailed information for ELR HNL1
⚠️ 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 |
|---|---|---|---|
| 2M 0221y to 3M 1705y | Pridoli Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 3M 1705y to 9M 0275y | Sand and Gravel | Glacial Sand and Gravel | Pridoli Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 9M 0275y to 11M 1155y | Pridoli Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 11M 1155y to 16M 0605y | Lower Devonian Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 16M 0605y to 17M 0385y | Clay, Silt and Sand | Alluvium | Lower Devonian Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 17M 0385y to 18M 1045y | Lower Devonian Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 18M 1045y to 18M 1595y | Clay, Silt and Sand | Alluvium | Lower Devonian Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 18M 1595y to 22M 0165y | Lower Devonian Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 22M 0165y to 22M 1045y | Sand and Gravel | Glacial Sand and Gravel | Lower Devonian Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 22M 1045y to 22M 1265y | Lower Devonian Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 22M 1265y to 25M 0495y | Sand and Gravel | Glacial Sand and Gravel | Lower Devonian Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 25M 0495y to 25M 0605y | Sand and Gravel | Glacial Sand and Gravel | Pridoli Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 25M 0605y to 25M 1265y | Pridoli Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 25M 1265y to 26M 0275y | Diamicton | Till | Pridoli Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 26M 0275y to 26M 0715y | Clay, Silt and Sand | Alluvium | Pridoli Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 26M 0715y to 26M 1485y | Diamicton | Till | Pridoli Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 26M 1485y to 27M 0165y | Pridoli Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 27M 0165y to 30M 0715y | Diamicton | Till | Pridoli Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 30M 0715y to 32M 0715y | Pridoli Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 32M 0715y to 32M 1045y | Lower Devonian Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 32M 1045y to 32M 1595y | Clay, Silt and Sand | Alluvium | Lower Devonian Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 32M 1595y to 33M 0495y | Lower Devonian Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 33M 0495y to 34M 1595y | Pridoli Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 34M 1595y to 37M 0495y | Clay, Silt and Sand | Alluvium | Pridoli Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 37M 0495y to 37M 1705y | Pridoli Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 37M 1705y to 39M 0275y | Clay, Silt and Sand | Alluvium | Pridoli Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 39M 0275y to 39M 0605y | Clay, Silt and Sand | Alluvium | Lower Devonian Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 39M 0605y to 40M 0935y | Lower Devonian Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 40M 0935y to 41M 1523y | Clay, Silt and Sand | Alluvium | Lower Devonian Rocks Ⓤ - Mudstone, Siltstone and Sandstone |