Geology for ELR SBR 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 |
|---|---|---|---|
| 32M 0170y to 32M 0935y | Grey Chalk Subgroup - Chalk | ||
| 32M 0935y to 33M 0165y | White Chalk Subgroup - Chalk | ||
| 33M 0165y to 33M 1045y | Grey Chalk Subgroup - Chalk | ||
| 33M 1045y to 34M 0165y | White Chalk Subgroup - Chalk | ||
| 34M 0165y to 34M 1045y | Diamicton | Till | White Chalk Subgroup - Chalk |
| 34M 1045y to 34M 1595y | Diamicton | Till | Grey Chalk Subgroup - Chalk |
| 34M 1595y to 35M 0495y | Diamicton | Till | White Chalk Subgroup - Chalk |
| 35M 0495y to 36M 0605y | White Chalk Subgroup - Chalk | ||
| 36M 0605y to 36M 0715y | Grey Chalk Subgroup - Chalk | ||
| 36M 0715y to 46M 0935y | White Chalk Subgroup - Chalk | ||
| 46M 0935y to 49M 0935y | Grey Chalk Subgroup - Chalk | ||
| 49M 0935y to 51M 1155y | Sand and Gravel | River Terrace Deposits Ⓤ | Grey Chalk Subgroup - Chalk |
| 51M 1155y to 52M 0715y | Grey Chalk Subgroup - Chalk | ||
| 52M 0715y to 52M 1265y | Sand and Gravel | River Terrace Deposits Ⓤ | Grey Chalk Subgroup - Chalk |
| 52M 1265y to 53M 0385y | Grey Chalk Subgroup - Chalk | ||
| 53M 0385y to 54M 0385y | Sand and Gravel | River Terrace Deposits Ⓤ | Grey Chalk Subgroup - Chalk |
| 54M 0385y to 54M 0825y | Clay, Silt and Sand | Alluvium | Grey Chalk Subgroup - Chalk |
| 54M 0825y to 54M 1705y | Sand and Gravel | River Terrace Deposits Ⓤ | Grey Chalk Subgroup - Chalk |
| 54M 1705y to 55M 0788y | Grey Chalk Subgroup - Chalk |