Geology for ELR EYD3 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 |
|---|---|---|---|
| 73M 0095y to 73M 0165y | Clay, Silt and Sand | Alluvium | Thames Group - Clay, Silt, Sand and Gravel |
| 73M 0165y to 74M 0385y | Silt | Brickearth | Bracklesham Group and Barton Group Ⓤ - Sand, Silt and Clay |
| 74M 0385y to 74M 0452y | Clay, Silt and Sand | Alluvium | Bracklesham Group and Barton Group Ⓤ - Sand, Silt and Clay |