Geology for ELR TLA 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 |
|---|---|---|---|
| 33M 1163y to 34M 0055y | Diamicton | Till | Lambeth Group - Clay, Silt, Sand and Gravel |
| 34M 0055y to 34M 0385y | Sand and Gravel | Glacial Sand and Gravel | Lambeth Group - Clay, Silt, Sand and Gravel |
| 34M 0385y to 35M 0165y | Sand and Gravel | Glacial Sand and Gravel | Thames Group - Clay, Silt, Sand and Gravel |
| 35M 0165y to 37M 0042y | Diamicton | Till | Thames Group - Clay, Silt, Sand and Gravel |