Geology for ELR NSA 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 -013y to 0M 0825y | Clay, Silt and Sand | Alluvium | Bracklesham Group and Barton Group Ⓤ - Sand, Silt and Clay |
| 0M 0825y to 0M 0917y | Bracklesham Group and Barton Group Ⓤ - Sand, Silt and Clay |