Geology for ELR STA 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 |
|---|---|---|---|
| 13M 0476y to 13M 1265y | Sand and Gravel | River Terrace Deposits Ⓤ | Thames Group - Clay, Silt, Sand and Gravel |
| 13M 1265y to 15M 0275y | Clay, Silt and Sand | Alluvium | Thames Group - Clay, Silt, Sand and Gravel |
| 15M 0275y to 15M 0935y | Thames Group - Clay, Silt, Sand and Gravel | ||
| 15M 0935y to 16M 0639y | Clay, Silt and Sand | Alluvium | Thames Group - Clay, Silt, Sand and Gravel |