Geology for ELR WLL 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 -035y to 1M 0385y | Sand and Gravel | River Terrace Deposits Ⓤ | Thames Group - Clay, Silt, Sand and Gravel |
| 1M 0385y to 1M 0495y | Sand and Gravel | River Terrace Deposits Ⓤ | |
| 1M 0495y to 1M 0605y | Clay, Silt and Sand | Alluvium | |
| 1M 0605y to 1M 0935y | Clay, Silt and Sand | Alluvium | Thames Group - Clay, Silt, Sand and Gravel |
| 1M 0935y to 3M 1375y | Sand and Gravel | River Terrace Deposits Ⓤ | Thames Group - Clay, Silt, Sand and Gravel |
| 3M 1375y to 4M 0055y | Thames Group - Clay, Silt, Sand and Gravel | ||
| 4M 0055y to 4M 0715y | Sand and Gravel | River Terrace Deposits Ⓤ | Thames Group - Clay, Silt, Sand and Gravel |
| 4M 0715y to 6M 0649y | Thames Group - Clay, Silt, Sand and Gravel |