Geology for ELR ELL3 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 |
|---|---|---|---|
| 7.860km to 7.996km | Clay, Silt and Sand | Alluvium | Thanet Sand Formation - Sand, Silt and Clay |
| 7.996km to 8.801km | Clay, Silt and Sand | Alluvium | White Chalk Subgroup - Chalk |
| 8.801km to 9.314km | Clay, Silt and Sand | Alluvium | Thanet Sand Formation - Sand, Silt and Clay |