See detailed information for ELR BTH3
⚠️ Geology shown below is based on British Geological Survey (BGS) low-resolution data sampled at 100 metre intervals along the ELR. The geology relative to the mileages should not be treated as accurate or complete. Data marked with Ⓤ is classed as undifferentiated by the BGS.
| Mileage | Material | Deposit | Bedrock |
|---|---|---|---|
| 14M 0197y to 14M 0385y | Sand and Gravel | River Terrace Deposits Ⓤ | Lambeth Group - Clay, Silt, Sand and Gravel |
| 14M 0385y to 14M 1375y | Sand and Gravel | River Terrace Deposits Ⓤ | Thames Group - Clay, Silt, Sand and Gravel |
| 14M 1375y to 17M 1705y | Thames Group - Clay, Silt, Sand and Gravel | ||
| 17M 1705y to 18M 0715y | Lambeth Group - Clay, Silt, Sand and Gravel | ||
| 18M 0715y to 18M 0935y | White Chalk Subgroup - Chalk | ||
| 18M 0935y to 18M 1595y | Clay, Silt and Sand | Alluvium | White Chalk Subgroup - Chalk |
| 18M 1595y to 19M 1045y | White Chalk Subgroup - Chalk | ||
| 19M 1045y to 19M 1705y | Clay, Silt and Sand | Alluvium | White Chalk Subgroup - Chalk |
| 19M 1705y to 20M 0495y | White Chalk Subgroup - Chalk | ||
| 20M 0495y to 20M 1375y | Clay, Silt and Sand | Alluvium | White Chalk Subgroup - Chalk |
| 20M 1375y to 21M 0165y | White Chalk Subgroup - Chalk | ||
| 21M 0165y to 21M 0495y | Clay, Silt and Sand | Alluvium | White Chalk Subgroup - Chalk |
| 21M 0495y to 21M 0825y | Clay, Silt and Sand | Alluvium | Grey Chalk Subgroup - Chalk |
| 21M 0825y to 21M 1485y | Grey Chalk Subgroup - Chalk | ||
| 21M 1485y to 22M 0275y | Clay, Silt and Sand | Alluvium | Grey Chalk Subgroup - Chalk |
| 22M 0275y to 22M 0605y | Clay, Silt and Sand | Alluvium | Gault Formation and Upper Greensand Formation Ⓤ - Mudstone, Sandstone and Limestone |
| 22M 0605y to 22M 1705y | Clay, Silt and Sand | Alluvium | Lower Greensand Group - Sandstone and Mudstone |
| 22M 1705y to 23M 0385y | Lower Greensand Group - Sandstone and Mudstone | ||
| 23M 0385y to 28M 0825y | Wealden Group - Mudstone, Siltstone and Sandstone | ||
| 28M 0825y to 28M 1265y | Wealden Group - Sandstone and Siltstone, Interbedded | ||
| 28M 1265y to 29M 1265y | Wealden Group - Mudstone, Siltstone and Sandstone | ||
| 29M 1265y to 30M 0495y | Wealden Group - Sandstone and Siltstone, Interbedded | ||
| 30M 0495y to 30M 0935y | Wealden Group - Mudstone, Siltstone and Sandstone | ||
| 30M 0935y to 30M 1375y | Wealden Group - Sandstone and Siltstone, Interbedded | ||
| 30M 1375y to 34M 0385y | Wealden Group - Mudstone, Siltstone and Sandstone | ||
| 34M 0385y to 35M 0954y | Wealden Group - Sandstone and Siltstone, Interbedded |