Geology for ELR MCJ1 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 |
|---|---|---|---|
| 196M 1640y to 200M 0495y | Thames Group - Clay, Silt, Sand and Gravel | ||
| 200M 0495y to 200M 0935y | Sand and Gravel | River Terrace Deposits Ⓤ | Thames Group - Clay, Silt, Sand and Gravel |
| 200M 0935y to 206M 0041y | Thames Group - Clay, Silt, Sand and Gravel |