See detailed information for ELR BHL
⚠️ 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 |
|---|---|---|---|
| 37M 1309y to 37M 1595y | Clay, Silt and Sand | Alluvium | Lambeth Group - Clay, Silt, Sand and Gravel |
| 37M 1595y to 38M 0715y | Clay, Silt and Sand | Alluvium | White Chalk Subgroup - Chalk |
| 38M 0715y to 40M 1705y | White Chalk Subgroup - Chalk | ||
| 40M 1705y to 41M 0715y | Sand and Gravel | River Terrace Deposits Ⓤ | White Chalk Subgroup - Chalk |
| 41M 0715y to 44M 0385y | Sand and Gravel | River Terrace Deposits Ⓤ | Lambeth Group - Clay, Silt, Sand and Gravel |
| 44M 0385y to 45M 0275y | Sand and Gravel | River Terrace Deposits Ⓤ | Thames Group - Clay, Silt, Sand and Gravel |
| 45M 0275y to 47M 0495y | Thames Group - Clay, Silt, Sand and Gravel | ||
| 47M 0495y to 48M 1155y | Sand and Gravel | River Terrace Deposits Ⓤ | Thames Group - Clay, Silt, Sand and Gravel |
| 48M 1155y to 51M 1375y | Sand and Gravel | River Terrace Deposits Ⓤ | Lambeth Group - Clay, Silt, Sand and Gravel |
| 51M 1375y to 52M 0715y | Clay, Silt and Sand | Alluvium | Lambeth Group - Clay, Silt, Sand and Gravel |
| 52M 0715y to 53M 1155y | Clay, Silt and Sand | Alluvium | White Chalk Subgroup - Chalk |
| 53M 1155y to 54M 1155y | Clay, Silt and Sand | Alluvium | Lambeth Group - Clay, Silt, Sand and Gravel |
| 54M 1155y to 55M 1485y | Clay, Silt and Sand | Alluvium | White Chalk Subgroup - Chalk |
| 55M 1485y to 56M 1265y | Sand and Gravel | River Terrace Deposits Ⓤ | White Chalk Subgroup - Chalk |
| 56M 1265y to 59M 0495y | Clay, Silt and Sand | Alluvium | White Chalk Subgroup - Chalk |
| 59M 0495y to 60M 0825y | Sand and Gravel | River Terrace Deposits Ⓤ | White Chalk Subgroup - Chalk |
| 60M 0825y to 61M 1705y | Clay, Silt and Sand | Alluvium | White Chalk Subgroup - Chalk |
| 61M 1705y to 68M 0605y | White Chalk Subgroup - Chalk | ||
| 68M 0605y to 68M 1045y | Gault Formation and Upper Greensand Formation Ⓤ - Mudstone, Sandstone and Limestone | ||
| 68M 1045y to 69M 0275y | White Chalk Subgroup - Chalk | ||
| 69M 0275y to 75M 1375y | Gault Formation and Upper Greensand Formation Ⓤ - Mudstone, Sandstone and Limestone | ||
| 75M 1375y to 76M 0055y | Sand and Gravel | River Terrace Deposits Ⓤ | Gault Formation and Upper Greensand Formation Ⓤ - Mudstone, Sandstone and Limestone |
| 76M 0055y to 79M 0935y | Gault Formation and Upper Greensand Formation Ⓤ - Mudstone, Sandstone and Limestone | ||
| 79M 0935y to 79M 1265y | Clay, Silt and Sand | Alluvium | Gault Formation and Upper Greensand Formation Ⓤ - Mudstone, Sandstone and Limestone |
| 79M 1265y to 80M 0055y | Gault Formation and Upper Greensand Formation Ⓤ - Mudstone, Sandstone and Limestone | ||
| 80M 0055y to 81M 0055y | Clay, Silt and Sand | Alluvium | Gault Formation and Upper Greensand Formation Ⓤ - Mudstone, Sandstone and Limestone |
| 81M 0055y to 81M 0440y | Gault Formation and Upper Greensand Formation Ⓤ - Mudstone, Sandstone and Limestone |