Geology for ELR FJS1 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 |
|---|---|---|---|
| 200.084km to 200.615km | Sand and Gravel | River Terrace Deposits Ⓤ | White Chalk Subgroup - Chalk |
| 200.615km to 201.520km | White Chalk Subgroup - Chalk | ||
| 201.520km to 204.134km | Thanet Sand Formation - Sand, Silt and Clay | ||
| 204.134km to 204.437km | White Chalk Subgroup - Chalk | ||
| 204.437km to 205.140km | Thanet Sand Formation - Sand, Silt and Clay | ||
| 205.140km to 206.106km | White Chalk Subgroup - Chalk |