Geology for ELR RTJ1 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 |
|---|---|---|---|
| 18M 0356y to 18M 0495y | Bracklesham Group and Barton Group Ⓤ - Sand, Silt and Clay | ||
| 18M 0495y to 18M 1265y | Sand and Gravel | Sand and Gravel of Uncertain Age and Origin | Bracklesham Group and Barton Group Ⓤ - Sand, Silt and Clay |
| 18M 1265y to 18M 1595y | Bracklesham Group and Barton Group Ⓤ - Sand, Silt and Clay | ||
| 18M 1595y to 19M 0825y | Silt | Brickearth | Bracklesham Group and Barton Group Ⓤ - Sand, Silt and Clay |
| 19M 0825y to 20M 0605y | Silt | Brickearth | Thames Group - Clay, Silt, Sand and Gravel |
| 20M 0605y to 22M 0275y | Sand and Gravel | River Terrace Deposits Ⓤ | Thames Group - Clay, Silt, Sand and Gravel |
| 22M 0275y to 23M 0706y | Sand and Gravel | River Terrace Deposits Ⓤ | Bracklesham Group and Barton Group Ⓤ - Sand, Silt and Clay |