Geology for ELR SBJ 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 |
|---|---|---|---|
| 17M 0816y to 17M 1375y | Thames Group - Clay, Silt, Sand and Gravel | ||
| 17M 1375y to 17M 1705y | Thanet Sand Formation - Sand, Silt and Clay | ||
| 17M 1705y to 18M 1265y | White Chalk Subgroup - Chalk | ||
| 18M 1265y to 19M 0055y | Thanet Sand Formation - Sand, Silt and Clay | ||
| 19M 0055y to 20M 0385y | White Chalk Subgroup - Chalk | ||
| 20M 0385y to 20M 0825y | Clay, Silt and Sand | Alluvium | White Chalk Subgroup - Chalk |
| 20M 0825y to 23M 0275y | White Chalk Subgroup - Chalk | ||
| 23M 0275y to 24M 0495y | Grey Chalk Subgroup - Chalk | ||
| 24M 0495y to 28M 0825y | Gault Formation and Upper Greensand Formation Ⓤ - Mudstone, Sandstone and Limestone | ||
| 28M 0825y to 38M 0825y | Lower Greensand Group - Sandstone and Mudstone | ||
| 38M 0825y to 39M 1045y | Clay, Silt and Sand | Alluvium | Lower Greensand Group - Sandstone and Mudstone |
| 39M 1045y to 39M 1265y | Lower Greensand Group - Sandstone and Mudstone | ||
| 39M 1265y to 39M 1705y | Wealden Group - Mudstone, Siltstone and Sandstone | ||
| 39M 1705y to 40M 1155y | Lower Greensand Group - Sandstone and Mudstone | ||
| 40M 1155y to 41M 0165y | Wealden Group - Mudstone, Siltstone and Sandstone | ||
| 41M 0165y to 43M 0605y | Lower Greensand Group - Sandstone and Mudstone | ||
| 43M 0605y to 43M 0935y | Gault Formation and Upper Greensand Formation Ⓤ - Mudstone, Sandstone and Limestone | ||
| 43M 0935y to 43M 1265y | Lower Greensand Group - Sandstone and Mudstone | ||
| 43M 1265y to 45M 1705y | Gault Formation and Upper Greensand Formation Ⓤ - Mudstone, Sandstone and Limestone | ||
| 45M 1705y to 46M 0275y | Grey Chalk Subgroup - Chalk | ||
| 46M 0275y to 47M 1595y | Gault Formation and Upper Greensand Formation Ⓤ - Mudstone, Sandstone and Limestone | ||
| 47M 1595y to 49M 0935y | Grey Chalk Subgroup - Chalk | ||
| 49M 0935y to 51M 0605y | Gault Formation and Upper Greensand Formation Ⓤ - Mudstone, Sandstone and Limestone | ||
| 51M 0605y to 51M 1595y | Lower Greensand Group - Sandstone and Mudstone | ||
| 51M 1595y to 53M 0275y | Gault Formation and Upper Greensand Formation Ⓤ - Mudstone, Sandstone and Limestone | ||
| 53M 0275y to 53M 0715y | Grey Chalk Subgroup - Chalk | ||
| 53M 0715y to 54M 1265y | Gault Formation and Upper Greensand Formation Ⓤ - Mudstone, Sandstone and Limestone | ||
| 54M 1265y to 56M 0825y | Lower Greensand Group - Sandstone and Mudstone | ||
| 56M 0825y to 56M 1485y | Silt | Brickearth | Lower Greensand Group - Sandstone and Mudstone |
| 56M 1485y to 58M 1155y | Lower Greensand Group - Sandstone and Mudstone | ||
| 58M 1155y to 59M 0037y | Wealden Group - Mudstone, Siltstone and Sandstone |