Geology for ELR NMS1 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 |
|---|---|---|---|
| 9M 1315y to 10M 0935y | Sand and Gravel | River Terrace Deposits Ⓤ | Thames Group - Clay, Silt, Sand and Gravel |
| 10M 0935y to 11M 1265y | Thames Group - Clay, Silt, Sand and Gravel | ||
| 11M 1265y to 12M 0605y | Sand and Gravel | River Terrace Deposits Ⓤ | Thames Group - Clay, Silt, Sand and Gravel |
| 12M 0605y to 12M 0715y | Clay, Silt and Sand | Alluvium | |
| 12M 0715y to 12M 1155y | Clay, Silt and Sand | Alluvium | Thames Group - Clay, Silt, Sand and Gravel |
| 12M 1155y to 14M 1173y | Sand and Gravel | River Terrace Deposits Ⓤ | Thames Group - Clay, Silt, Sand and Gravel |