Geology for ELR HDC 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 |
|---|---|---|---|
| 0M -042y to 0M 0275y | Sand and Gravel | Glacial Sand and Gravel | Pridoli Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 0M 0275y to 0M 1485y | Clay, Silt and Sand | Alluvium | Pridoli Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 0M 1485y to 1M 0605y | Sand and Gravel | Glacial Sand and Gravel | Pridoli Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 1M 0605y to 2M 0253y | Pridoli Rocks Ⓤ - Mudstone, Siltstone and Sandstone |