Geology for ELR SOB2 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 |
|---|---|---|---|
| 1M 1219y to 2M 0385y | White Chalk Subgroup - Chalk | ||
| 2M 0385y to 2M 1155y | Grey Chalk Subgroup - Chalk | ||
| 2M 1155y to 3M 0055y | Clay, Silt and Sand | Alluvium | Grey Chalk Subgroup - Chalk |
| 3M 0055y to 6M 0935y | Grey Chalk Subgroup - Chalk | ||
| 6M 0935y to 6M 1045y | Gault Formation and Upper Greensand Formation Ⓤ - Mudstone, Sandstone and Limestone | ||
| 6M 1045y to 7M 0165y | Sand and Gravel | River Terrace Deposits Ⓤ | Gault Formation and Upper Greensand Formation Ⓤ - Mudstone, Sandstone and Limestone |
| 7M 0165y to 7M 1485y | Gault Formation and Upper Greensand Formation Ⓤ - Mudstone, Sandstone and Limestone | ||
| 7M 1485y to 8M 0275y | Sand and Gravel | River Terrace Deposits Ⓤ | Gault Formation and Upper Greensand Formation Ⓤ - Mudstone, Sandstone and Limestone |
| 8M 0275y to 9M 0715y | Gault Formation and Upper Greensand Formation Ⓤ - Mudstone, Sandstone and Limestone | ||
| 9M 0715y to 10M 0495y | Lower Greensand Group - Sandstone and Mudstone | ||
| 10M 0495y to 11M 0935y | West Walton Formation, Ampthill Clay Formation and Kimmeridge Clay Formation Ⓤ - Mudstone | ||
| 11M 0935y to 12M 0495y | Peat | Peat | West Walton Formation, Ampthill Clay Formation and Kimmeridge Clay Formation Ⓤ - Mudstone |
| 12M 0495y to 12M 1045y | West Walton Formation, Ampthill Clay Formation and Kimmeridge Clay Formation Ⓤ - Mudstone | ||
| 12M 1045y to 12M 1679y | Peat | Peat | West Walton Formation, Ampthill Clay Formation and Kimmeridge Clay Formation Ⓤ - Mudstone |