Geology for ELR YMS 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 |
|---|---|---|---|
| 0M 0002y to 0M 0056y | Sand and Gravel | Glacial Sand and Gravel | Triassic Rocks Ⓤ - Sandstone and Conglomerate, Interbedded |
| 0M 0056y to 0M 0605y | Clay, Silt and Sand | Alluvium | Triassic Rocks Ⓤ - Sandstone and Conglomerate, Interbedded |
| 0M 0605y to 0M 0935y | Clay | Lacustrine Deposits Ⓤ | Triassic Rocks Ⓤ - Sandstone and Conglomerate, Interbedded |
| 0M 0935y to 0M 1595y | Diamicton | Till | Triassic Rocks Ⓤ - Sandstone and Conglomerate, Interbedded |
| 0M 1595y to 6M 0495y | Clay | Lacustrine Deposits Ⓤ | Triassic Rocks Ⓤ - Sandstone and Conglomerate, Interbedded |
| 6M 0495y to 8M 1375y | Clay | Lacustrine Deposits Ⓤ | Triassic Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 8M 1375y to 10M 1705y | Diamicton | Till | Triassic Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 10M 1705y to 11M 1375y | Diamicton | Till | Lias Group - Mudstone, Siltstone, Limestone and Sandstone |
| 11M 1375y to 12M 0275y | Clay | Lacustrine Deposits Ⓤ | Lias Group - Mudstone, Siltstone, Limestone and Sandstone |
| 12M 0275y to 12M 0495y | Clay | Lacustrine Deposits Ⓤ | Triassic Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 12M 0495y to 12M 0935y | Diamicton | Till | Triassic Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 12M 0935y to 13M 0385y | Triassic Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 13M 0385y to 13M 0715y | Diamicton | Till | Triassic Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 13M 0715y to 13M 1485y | Triassic Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 13M 1485y to 14M 0165y | Lias Group - Mudstone, Siltstone, Limestone and Sandstone | ||
| 14M 0165y to 14M 1265y | Clay, Silt and Sand | Alluvium | Lias Group - Mudstone, Siltstone, Limestone and Sandstone |
| 14M 1265y to 15M 1705y | Lias Group - Mudstone, Siltstone, Limestone and Sandstone | ||
| 15M 1705y to 16M 1375y | Ravenscar Group - Sandstone, Siltstone and Mudstone | ||
| 16M 1375y to 17M 1375y | Clay, Silt and Sand | Alluvium | Ravenscar Group - Sandstone, Siltstone and Mudstone |
| 17M 1375y to 17M 1485y | Ravenscar Group - Sandstone, Siltstone and Mudstone | ||
| 17M 1485y to 18M 1375y | Corallian Group - Limestone, Sandstone, Siltstone and Mudstone | ||
| 18M 1375y to 18M 1595y | Clay | Lacustrine Deposits Ⓤ | Corallian Group - Limestone, Sandstone, Siltstone and Mudstone |
| 18M 1595y to 20M 0935y | Clay | Lacustrine Deposits Ⓤ | West Walton Formation, Ampthill Clay Formation and Kimmeridge Clay Formation Ⓤ - Mudstone |
| 20M 0935y to 21M 1045y | West Walton Formation, Ampthill Clay Formation and Kimmeridge Clay Formation Ⓤ - Mudstone | ||
| 21M 1045y to 21M 1375y | Clay | Lacustrine Deposits Ⓤ | West Walton Formation, Ampthill Clay Formation and Kimmeridge Clay Formation Ⓤ - Mudstone |
| 21M 1375y to 21M 1485y | West Walton Formation, Ampthill Clay Formation and Kimmeridge Clay Formation Ⓤ - Mudstone | ||
| 21M 1485y to 22M 0605y | Corallian Group - Limestone, Sandstone, Siltstone and Mudstone | ||
| 22M 0605y to 22M 1265y | Clay | Lacustrine Deposits Ⓤ | Corallian Group - Limestone, Sandstone, Siltstone and Mudstone |
| 22M 1265y to 32M 1485y | Clay | Lacustrine Deposits Ⓤ | West Walton Formation, Ampthill Clay Formation and Kimmeridge Clay Formation Ⓤ - Mudstone |
| 32M 1485y to 37M 1265y | Clay | Lacustrine Deposits Ⓤ | Wealden Group - Mudstone, Siltstone and Sandstone |
| 37M 1265y to 38M 0935y | Clay | Lacustrine Deposits Ⓤ | West Walton Formation, Ampthill Clay Formation and Kimmeridge Clay Formation Ⓤ - Mudstone |
| 38M 0935y to 39M 0495y | Sand and Gravel | Glacial Sand and Gravel | Corallian Group - Limestone, Sandstone, Siltstone and Mudstone |
| 39M 0495y to 39M 1595y | Corallian Group - Limestone, Sandstone, Siltstone and Mudstone | ||
| 39M 1595y to 40M 0165y | Diamicton | Till | Corallian Group - Limestone, Sandstone, Siltstone and Mudstone |
| 40M 0165y to 40M 0605y | Diamicton | Till | Kellaways Formation and Oxford Clay Formation Ⓤ - Mudstone, Siltstone and Sandstone |
| 40M 0605y to 42M 0146y | Diamicton | Till | Ravenscar Group - Sandstone, Siltstone and Mudstone |