Geology for ELR ETN 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 |
|---|---|---|---|
| 71M 1455y to 72M 0165y | West Walton Formation, Ampthill Clay Formation and Kimmeridge Clay Formation Ⓤ - Mudstone | ||
| 72M 0165y to 76M 0385y | Peat | Peat | West Walton Formation, Ampthill Clay Formation and Kimmeridge Clay Formation Ⓤ - Mudstone |
| 76M 0385y to 76M 1265y | Peat | Peat | Lower Greensand Group - Sandstone and Mudstone |
| 76M 1265y to 77M 0605y | Peat | Peat | Gault Formation and Upper Greensand Formation Ⓤ - Mudstone, Sandstone and Limestone |
| 77M 0605y to 79M 0055y | Clay | Lacustrine Deposits Ⓤ | Gault Formation and Upper Greensand Formation Ⓤ - Mudstone, Sandstone and Limestone |
| 79M 0055y to 79M 1485y | Clay | Lacustrine Deposits Ⓤ | Grey Chalk Subgroup - Chalk |
| 79M 1485y to 82M 1375y | Peat | Peat | Grey Chalk Subgroup - Chalk |
| 82M 1375y to 84M 0055y | Peat | Peat | White Chalk Subgroup - Chalk |
| 84M 0055y to 85M 0825y | White Chalk Subgroup - Chalk | ||
| 85M 0825y to 86M 0165y | Peat | Peat | White Chalk Subgroup - Chalk |
| 86M 0165y to 90M 1705y | White Chalk Subgroup - Chalk | ||
| 90M 1705y to 92M 1375y | Sand and Gravel | River Terrace Deposits Ⓤ | White Chalk Subgroup - Chalk |
| 92M 1375y to 94M 0605y | White Chalk Subgroup - Chalk | ||
| 94M 0605y to 96M 1595y | Diamicton | Till | White Chalk Subgroup - Chalk |
| 96M 1595y to 99M 0715y | White Chalk Subgroup - Chalk | ||
| 99M 0715y to 101M 0715y | Diamicton | Till | White Chalk Subgroup - Chalk |
| 101M 0715y to 101M 0935y | White Chalk Subgroup - Chalk | ||
| 101M 0935y to 101M 1375y | Clay, Silt and Sand | Alluvium | White Chalk Subgroup - Chalk |
| 101M 1375y to 103M 0495y | Diamicton | Till | White Chalk Subgroup - Chalk |
| 103M 0495y to 104M 0055y | Sand and Gravel | Glacial Sand and Gravel | White Chalk Subgroup - Chalk |
| 104M 0055y to 113M 0055y | Diamicton | Till | White Chalk Subgroup - Chalk |
| 113M 0055y to 113M 0605y | Sand and Gravel | Glacial Sand and Gravel | White Chalk Subgroup - Chalk |
| 113M 0605y to 113M 1375y | Diamicton | Till | White Chalk Subgroup - Chalk |
| 113M 1375y to 114M 0385y | Sand and Gravel | Glacial Sand and Gravel | White Chalk Subgroup - Chalk |
| 114M 0385y to 117M 0935y | Diamicton | Till | White Chalk Subgroup - Chalk |
| 117M 0935y to 119M 1485y | Sand and Gravel | Glacial Sand and Gravel | White Chalk Subgroup - Chalk |
| 119M 1485y to 120M 0605y | Clay, Silt and Sand | Alluvium | White Chalk Subgroup - Chalk |
| 120M 0605y to 120M 1375y | White Chalk Subgroup - Chalk | ||
| 120M 1375y to 121M 0385y | Sand and Gravel | Crag Group | White Chalk Subgroup - Chalk |
| 121M 0385y to 122M 1155y | Sand and Gravel | Glacial Sand and Gravel | White Chalk Subgroup - Chalk |
| 122M 1155y to 122M 1705y | White Chalk Subgroup - Chalk | ||
| 122M 1705y to 123M 0036y | Clay, Silt and Sand | Alluvium | White Chalk Subgroup - Chalk |