Geology for ELR TFN 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 -003y to 0M 0385y | Sand and Gravel | Glacial Sand and Gravel | Neogene to Quaternary Rocks Ⓤ - Gravel, Sand, Silt and Clay |
| 0M 0385y to 0M 1045y | Sand and Gravel | Glacial Sand and Gravel | Thames Group - Clay, Silt, Sand and Gravel |
| 0M 1045y to 1M 0682y | Thames Group - Clay, Silt, Sand and Gravel |