Geology for ELR LEJ 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 |
|---|---|---|---|
| 18M 0215y to 18M 1265y | Lambeth Group - Clay, Silt, Sand and Gravel | ||
| 18M 1265y to 18M 1595y | Thames Group - Clay, Silt, Sand and Gravel | ||
| 18M 1595y to 19M 0495y | Clay, Silt and Sand | Alluvium | Thames Group - Clay, Silt, Sand and Gravel |
| 19M 0495y to 22M 0336y | Thames Group - Clay, Silt, Sand and Gravel |