Geology for ELR ECM1 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 -101y to 0M 0715y | Thames Group - Clay, Silt, Sand and Gravel | ||
| 0M 0715y to 0M 1265y | Sand and Gravel | River Terrace Deposits Ⓤ | Thames Group - Clay, Silt, Sand and Gravel |
| 0M 1265y to 11M 1485y | Thames Group - Clay, Silt, Sand and Gravel | ||
| 11M 1485y to 12M 0275y | Sand and Gravel | Sand and Gravel of Uncertain Age and Origin | Thames Group - Clay, Silt, Sand and Gravel |
| 12M 0275y to 13M 0055y | Thames Group - Clay, Silt, Sand and Gravel | ||
| 13M 0055y to 13M 1045y | Lambeth Group - Clay, Silt, Sand and Gravel | ||
| 13M 1045y to 13M 1595y | Thames Group - Clay, Silt, Sand and Gravel | ||
| 13M 1595y to 15M 0605y | Lambeth Group - Clay, Silt, Sand and Gravel | ||
| 15M 0605y to 16M 0055y | Diamicton | Till | Lambeth Group - Clay, Silt, Sand and Gravel |
| 16M 0055y to 16M 0495y | Diamicton | Till | White Chalk Subgroup - Chalk |
| 16M 0495y to 16M 0715y | Sand and Gravel | Sand and Gravel of Uncertain Age and Origin | White Chalk Subgroup - Chalk |
| 16M 0715y to 17M 0165y | Diamicton | Till | White Chalk Subgroup - Chalk |
| 17M 0165y to 19M 0715y | Sand and Gravel | Glacial Sand and Gravel | White Chalk Subgroup - Chalk |
| 19M 0715y to 20M 1265y | Diamicton | Till | White Chalk Subgroup - Chalk |
| 20M 1265y to 21M 0385y | White Chalk Subgroup - Chalk | ||
| 21M 0385y to 21M 1485y | Sand and Gravel | Glacial Sand and Gravel | White Chalk Subgroup - Chalk |
| 21M 1485y to 22M 0935y | White Chalk Subgroup - Chalk | ||
| 22M 0935y to 23M 0385y | Diamicton | Till | White Chalk Subgroup - Chalk |
| 23M 0385y to 30M 1045y | Sand and Gravel | Glacial Sand and Gravel | White Chalk Subgroup - Chalk |
| 30M 1045y to 32M 0165y | White Chalk Subgroup - Chalk | ||
| 32M 0165y to 33M 0495y | Grey Chalk Subgroup - Chalk | ||
| 33M 0495y to 33M 1045y | Sand and Gravel | Glacial Sand and Gravel | Grey Chalk Subgroup - Chalk |
| 33M 1045y to 34M 0385y | Diamicton | Till | Grey Chalk Subgroup - Chalk |
| 34M 0385y to 35M 1155y | Grey Chalk Subgroup - Chalk | ||
| 35M 1155y to 35M 1375y | Diamicton | Till | Grey Chalk Subgroup - Chalk |
| 35M 1375y to 36M 0275y | Diamicton | Till | Gault Formation and Upper Greensand Formation Ⓤ - Mudstone, Sandstone and Limestone |
| 36M 0275y to 36M 0935y | Gault Formation and Upper Greensand Formation Ⓤ - Mudstone, Sandstone and Limestone | ||
| 36M 0935y to 37M 0055y | Clay, Silt and Sand | Alluvium | Gault Formation and Upper Greensand Formation Ⓤ - Mudstone, Sandstone and Limestone |
| 37M 0055y to 37M 0495y | Gault Formation and Upper Greensand Formation Ⓤ - Mudstone, Sandstone and Limestone | ||
| 37M 0495y to 39M 0275y | Diamicton | Till | Gault Formation and Upper Greensand Formation Ⓤ - Mudstone, Sandstone and Limestone |
| 39M 0275y to 39M 1155y | Sand and Gravel | River Terrace Deposits Ⓤ | Gault Formation and Upper Greensand Formation Ⓤ - Mudstone, Sandstone and Limestone |
| 39M 1155y to 42M 0935y | Sand and Gravel | River Terrace Deposits Ⓤ | Lower Greensand Group - Sandstone and Mudstone |
| 42M 0935y to 42M 1375y | Clay, Silt and Sand | Alluvium | Lower Greensand Group - Sandstone and Mudstone |
| 42M 1375y to 44M 0935y | Lower Greensand Group - Sandstone and Mudstone | ||
| 44M 0935y to 49M 0495y | Kellaways Formation and Oxford Clay Formation Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 49M 0495y to 50M 0055y | Diamicton | Till | Kellaways Formation and Oxford Clay Formation Ⓤ - Mudstone, Siltstone and Sandstone |
| 50M 0055y to 50M 0935y | Kellaways Formation and Oxford Clay Formation Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 50M 0935y to 54M 0935y | Diamicton | Till | Kellaways Formation and Oxford Clay Formation Ⓤ - Mudstone, Siltstone and Sandstone |
| 54M 0935y to 54M 1375y | Clay, Silt and Sand | Alluvium | Kellaways Formation and Oxford Clay Formation Ⓤ - Mudstone, Siltstone and Sandstone |
| 54M 1375y to 56M 0495y | Sand and Gravel | River Terrace Deposits Ⓤ | Kellaways Formation and Oxford Clay Formation Ⓤ - Mudstone, Siltstone and Sandstone |
| 56M 0495y to 57M 1155y | Diamicton | Till | Kellaways Formation and Oxford Clay Formation Ⓤ - Mudstone, Siltstone and Sandstone |
| 57M 1155y to 58M 0825y | Clay, Silt and Sand | Alluvium | Kellaways Formation and Oxford Clay Formation Ⓤ - Mudstone, Siltstone and Sandstone |
| 58M 0825y to 60M 0055y | Kellaways Formation and Oxford Clay Formation Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 60M 0055y to 62M 0275y | Diamicton | Till | Kellaways Formation and Oxford Clay Formation Ⓤ - Mudstone, Siltstone and Sandstone |
| 62M 0275y to 62M 1265y | Kellaways Formation and Oxford Clay Formation Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 62M 1265y to 62M 1375y | Diamicton | Till | Kellaways Formation and Oxford Clay Formation Ⓤ - Mudstone, Siltstone and Sandstone |
| 62M 1375y to 63M 0605y | Kellaways Formation and Oxford Clay Formation Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 63M 0605y to 63M 1155y | Diamicton | Till | Kellaways Formation and Oxford Clay Formation Ⓤ - Mudstone, Siltstone and Sandstone |
| 63M 1155y to 64M 0165y | Kellaways Formation and Oxford Clay Formation Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 64M 0165y to 64M 1485y | Diamicton | Till | Kellaways Formation and Oxford Clay Formation Ⓤ - Mudstone, Siltstone and Sandstone |
| 64M 1485y to 65M 1375y | Kellaways Formation and Oxford Clay Formation Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 65M 1375y to 72M 0165y | Peat | Peat | Kellaways Formation and Oxford Clay Formation Ⓤ - Mudstone, Siltstone and Sandstone |
| 72M 0165y to 73M 0495y | Diamicton | Till | Kellaways Formation and Oxford Clay Formation Ⓤ - Mudstone, Siltstone and Sandstone |
| 73M 0495y to 75M 0275y | Kellaways Formation and Oxford Clay Formation Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 75M 0275y to 75M 0825y | Sand and Gravel | River Terrace Deposits Ⓤ | Kellaways Formation and Oxford Clay Formation Ⓤ - Mudstone, Siltstone and Sandstone |
| 75M 0825y to 75M 1375y | Kellaways Formation and Oxford Clay Formation Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 75M 1375y to 76M 1265y | Great Oolite Group - Sandstone, Limestone and Argillaceous Rocks | ||
| 76M 1265y to 77M 0165y | Sand and Gravel | River Terrace Deposits Ⓤ | Great Oolite Group - Sandstone, Limestone and Argillaceous Rocks |
| 77M 0165y to 78M 1485y | Great Oolite Group - Sandstone, Limestone and Argillaceous Rocks | ||
| 78M 1485y to 80M 1155y | Kellaways Formation and Oxford Clay Formation Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 80M 1155y to 81M 0165y | Great Oolite Group - Sandstone, Limestone and Argillaceous Rocks | ||
| 81M 0165y to 81M 0935y | Sand and Gravel | River Terrace Deposits Ⓤ | Great Oolite Group - Sandstone, Limestone and Argillaceous Rocks |
| 81M 0935y to 81M 1375y | Sand and Gravel | River Terrace Deposits Ⓤ | Kellaways Formation and Oxford Clay Formation Ⓤ - Mudstone, Siltstone and Sandstone |
| 81M 1375y to 82M 1265y | Sand and Gravel | River Terrace Deposits Ⓤ | Great Oolite Group - Sandstone, Limestone and Argillaceous Rocks |
| 82M 1265y to 83M 0165y | Clay, Silt and Sand | Alluvium | Great Oolite Group - Sandstone, Limestone and Argillaceous Rocks |
| 83M 0165y to 83M 1265y | Sand and Gravel | River Terrace Deposits Ⓤ | Great Oolite Group - Sandstone, Limestone and Argillaceous Rocks |
| 83M 1265y to 83M 1485y | Sand and Gravel | River Terrace Deposits Ⓤ | Kellaways Formation and Oxford Clay Formation Ⓤ - Mudstone, Siltstone and Sandstone |
| 83M 1485y to 84M 0825y | Clay, Silt and Sand | Alluvium | Kellaways Formation and Oxford Clay Formation Ⓤ - Mudstone, Siltstone and Sandstone |
| 84M 0825y to 85M 1595y | Sand and Gravel | River Terrace Deposits Ⓤ | Kellaways Formation and Oxford Clay Formation Ⓤ - Mudstone, Siltstone and Sandstone |
| 85M 1595y to 86M 0935y | Sand and Gravel | Glacial Sand and Gravel | Kellaways Formation and Oxford Clay Formation Ⓤ - Mudstone, Siltstone and Sandstone |
| 86M 0935y to 86M 1155y | Kellaways Formation and Oxford Clay Formation Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 86M 1155y to 86M 1705y | Great Oolite Group - Sandstone, Limestone and Argillaceous Rocks | ||
| 86M 1705y to 87M 0055y | Sand and Gravel | River Terrace Deposits Ⓤ | Great Oolite Group - Sandstone, Limestone and Argillaceous Rocks |
| 87M 0055y to 88M 0605y | Great Oolite Group - Sandstone, Limestone and Argillaceous Rocks | ||
| 88M 0605y to 88M 0825y | Inferior Oolite Group - Limestone, Sandstone, Siltstone and Mudstone | ||
| 88M 0825y to 89M 0495y | Great Oolite Group - Sandstone, Limestone and Argillaceous Rocks | ||
| 89M 0495y to 89M 1155y | Inferior Oolite Group - Limestone, Sandstone, Siltstone and Mudstone | ||
| 89M 1155y to 90M 0385y | Great Oolite Group - Sandstone, Limestone and Argillaceous Rocks | ||
| 90M 0385y to 90M 0605y | Inferior Oolite Group - Limestone, Sandstone, Siltstone and Mudstone | ||
| 90M 0605y to 90M 1485y | Great Oolite Group - Sandstone, Limestone and Argillaceous Rocks | ||
| 90M 1485y to 95M 0385y | Inferior Oolite Group - Limestone, Sandstone, Siltstone and Mudstone | ||
| 95M 0385y to 95M 0935y | Great Oolite Group - Sandstone, Limestone and Argillaceous Rocks | ||
| 95M 0935y to 97M 0605y | Inferior Oolite Group - Limestone, Sandstone, Siltstone and Mudstone | ||
| 97M 0605y to 97M 1155y | Great Oolite Group - Sandstone, Limestone and Argillaceous Rocks | ||
| 97M 1155y to 97M 1485y | Inferior Oolite Group - Limestone, Sandstone, Siltstone and Mudstone | ||
| 97M 1485y to 98M 1045y | Diamicton | Till | Inferior Oolite Group - Limestone, Sandstone, Siltstone and Mudstone |
| 98M 1045y to 100M 0935y | Diamicton | Till | Great Oolite Group - Sandstone, Limestone and Argillaceous Rocks |
| 100M 0935y to 101M 1265y | Diamicton | Till | Inferior Oolite Group - Limestone, Sandstone, Siltstone and Mudstone |
| 101M 1265y to 104M 0275y | Inferior Oolite Group - Limestone, Sandstone, Siltstone and Mudstone | ||
| 104M 0275y to 104M 1595y | Lias Group - Mudstone, Siltstone, Limestone and Sandstone | ||
| 104M 1595y to 106M 0385y | Sand and Gravel | River Terrace Deposits Ⓤ | Lias Group - Mudstone, Siltstone, Limestone and Sandstone |
| 106M 0385y to 109M 0935y | Lias Group - Mudstone, Siltstone, Limestone and Sandstone | ||
| 109M 0935y to 110M 0385y | Sand and Gravel | River Terrace Deposits Ⓤ | Lias Group - Mudstone, Siltstone, Limestone and Sandstone |
| 110M 0385y to 112M 0825y | Lias Group - Mudstone, Siltstone, Limestone and Sandstone | ||
| 112M 0825y to 113M 0935y | Sand and Gravel | River Terrace Deposits Ⓤ | Lias Group - Mudstone, Siltstone, Limestone and Sandstone |
| 113M 0935y to 116M 0055y | Lias Group - Mudstone, Siltstone, Limestone and Sandstone | ||
| 116M 0055y to 117M 0275y | Clay, Silt and Sand | Alluvium | Lias Group - Mudstone, Siltstone, Limestone and Sandstone |
| 117M 0275y to 117M 0385y | Lias Group - Mudstone, Siltstone, Limestone and Sandstone | ||
| 117M 0385y to 117M 1265y | Sand and Gravel | River Terrace Deposits Ⓤ | Lias Group - Mudstone, Siltstone, Limestone and Sandstone |
| 117M 1265y to 120M 1045y | Sand and Gravel | River Terrace Deposits Ⓤ | Triassic Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 120M 1045y to 121M 1265y | Clay, Silt and Sand | Alluvium | Triassic Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 121M 1265y to 127M 0275y | Sand and Gravel | River Terrace Deposits Ⓤ | Triassic Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 127M 0275y to 127M 0495y | Triassic Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 127M 0495y to 128M 1595y | Clay, Silt and Sand | Alluvium | Triassic Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 128M 1595y to 136M 1045y | Triassic Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 136M 1045y to 137M 0275y | Sand and Gravel | River Terrace Deposits Ⓤ | Triassic Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 137M 0275y to 138M 0055y | Sand and Gravel | Glacial Sand and Gravel | Triassic Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 138M 0055y to 138M 0385y | Clay, Silt and Sand | Alluvium | Triassic Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 138M 0385y to 138M 0935y | Clay, Silt and Sand | Alluvium | Triassic Rocks Ⓤ - Sandstone and Conglomerate, Interbedded |
| 138M 0935y to 144M 0055y | Sand and Gravel | River Terrace Deposits Ⓤ | Triassic Rocks Ⓤ - Sandstone and Conglomerate, Interbedded |
| 144M 0055y to 144M 0935y | Sand and Gravel | Glacial Sand and Gravel | Triassic Rocks Ⓤ - Sandstone and Conglomerate, Interbedded |
| 144M 0935y to 144M 1485y | Sand and Gravel | River Terrace Deposits Ⓤ | Triassic Rocks Ⓤ - Sandstone and Conglomerate, Interbedded |
| 144M 1485y to 145M 0275y | Triassic Rocks Ⓤ - Sandstone and Conglomerate, Interbedded | ||
| 145M 0275y to 146M 0165y | Clay, Silt and Sand | Alluvium | Triassic Rocks Ⓤ - Sandstone and Conglomerate, Interbedded |
| 146M 0165y to 147M 0605y | Triassic Rocks Ⓤ - Sandstone and Conglomerate, Interbedded | ||
| 147M 0605y to 147M 1375y | Diamicton | Till | Triassic Rocks Ⓤ - Sandstone and Conglomerate, Interbedded |
| 147M 1375y to 148M 0825y | Sand and Gravel | Glacial Sand and Gravel | Triassic Rocks Ⓤ - Sandstone and Conglomerate, Interbedded |
| 148M 0825y to 149M 0605y | Diamicton | Till | Triassic Rocks Ⓤ - Sandstone and Conglomerate, Interbedded |
| 149M 0605y to 151M 0275y | Sand and Gravel | Glacial Sand and Gravel | Triassic Rocks Ⓤ - Sandstone and Conglomerate, Interbedded |
| 151M 0275y to 151M 1265y | Triassic Rocks Ⓤ - Sandstone and Conglomerate, Interbedded | ||
| 151M 1265y to 152M 0825y | Peat | Peat | Triassic Rocks Ⓤ - Sandstone and Conglomerate, Interbedded |
| 152M 0825y to 153M 0495y | Triassic Rocks Ⓤ - Sandstone and Conglomerate, Interbedded | ||
| 153M 0495y to 154M 1155y | Clay, Silt and Sand | Alluvium | Triassic Rocks Ⓤ - Sandstone and Conglomerate, Interbedded |
| 154M 1155y to 154M 1375y | Clay, Silt and Sand | Alluvium | Permian Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 154M 1375y to 155M 0165y | Clay, Silt and Sand | Alluvium | Triassic Rocks Ⓤ - Sandstone and Conglomerate, Interbedded |
| 155M 0165y to 155M 0935y | Sand and Gravel | Glacial Sand and Gravel | Triassic Rocks Ⓤ - Sandstone and Conglomerate, Interbedded |
| 155M 0935y to 156M 0055y | Triassic Rocks Ⓤ - Sandstone and Conglomerate, Interbedded | ||
| 156M 0055y to 157M 1155y | Clay, Silt and Sand | Alluvium | Triassic Rocks Ⓤ - Sandstone and Conglomerate, Interbedded |
| 157M 1155y to 160M 0318y | Clay | Lacustrine Deposits Ⓤ | Triassic Rocks Ⓤ - Sandstone and Conglomerate, Interbedded |