Geology for ELR RLL 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 |
|---|---|---|---|
| 35M 0723y to 35M 1155y | Clay, Silt and Sand | Alluvium | White Chalk Subgroup - Chalk |
| 35M 1155y to 35M 1265y | Sand and Gravel | River Terrace Deposits Ⓤ | White Chalk Subgroup - Chalk |
| 35M 1265y to 35M 1374y | Clay, Silt and Sand | Alluvium | White Chalk Subgroup - Chalk |