Geology for ELR FEL 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 |
|---|---|---|---|
| 72M 0447y to 72M 0715y | Diamicton | Till | Thames Group - Clay, Silt, Sand and Gravel |
| 72M 0715y to 72M 1705y | Sand and Gravel | Glacial Sand and Gravel | Thames Group - Clay, Silt, Sand and Gravel |
| 72M 1705y to 73M 1595y | Diamicton | Till | Thames Group - Clay, Silt, Sand and Gravel |
| 73M 1595y to 74M 0055y | Diamicton | Till | Neogene to Quaternary Rocks Ⓤ - Gravel, Sand, Silt and Clay |
| 74M 0055y to 74M 0275y | Sand and Gravel | Glacial Sand and Gravel | Neogene to Quaternary Rocks Ⓤ - Gravel, Sand, Silt and Clay |
| 74M 0275y to 74M 0825y | Sand and Gravel | Glacial Sand and Gravel | Thames Group - Clay, Silt, Sand and Gravel |
| 74M 0825y to 82M 1595y | Sand and Gravel | Glacial Sand and Gravel | Neogene to Quaternary Rocks Ⓤ - Gravel, Sand, Silt and Clay |
| 82M 1595y to 83M 0275y | Sand and Gravel | Glacial Sand and Gravel | Thames Group - Clay, Silt, Sand and Gravel |
| 83M 0275y to 84M 0055y | Sand and Gravel | Glacial Sand and Gravel | Neogene to Quaternary Rocks Ⓤ - Gravel, Sand, Silt and Clay |
| 84M 0055y to 84M 0275y | Neogene to Quaternary Rocks Ⓤ - Gravel, Sand, Silt and Clay | ||
| 84M 0275y to 84M 0783y | Sand and Gravel | Crag Group | Neogene to Quaternary Rocks Ⓤ - Gravel, Sand, Silt and Clay |