Geology for ELR TRL7 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 |
|---|---|---|---|
| 1.947km to 2.262km | Wealden Group - Mudstone, Siltstone and Sandstone | ||
| 2.262km to 2.565km | Clay, Silt and Sand | Alluvium | Wealden Group - Mudstone, Siltstone and Sandstone |
| 2.565km to 3.670km | Wealden Group - Mudstone, Siltstone and Sandstone | ||
| 3.670km to 4.296km | Lower Greensand Group - Sandstone and Mudstone |