Geology for ELR CJC 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 |
|---|---|---|---|
| 4M 0810y to 4M 1155y | Clay, Silt and Sand | Alluvium | Thames Group - Clay, Silt, Sand and Gravel |
| 4M 1155y to 4M 1705y | Thames Group - Clay, Silt, Sand and Gravel | ||
| 4M 1705y to 5M 0165y | Clay, Silt and Sand | Alluvium | Thames Group - Clay, Silt, Sand and Gravel |
| 5M 0165y to 6M 0055y | Sand and Gravel | River Terrace Deposits Ⓤ | Thames Group - Clay, Silt, Sand and Gravel |
| 6M 0055y to 10M 0835y | Thames Group - Clay, Silt, Sand and Gravel |