Geology for ELR RED2 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 |
|---|---|---|---|
| 16M 0963y to 19M 1485y | White Chalk Subgroup - Chalk | ||
| 19M 1485y to 20M 0165y | Diamicton | Clay-With-Flints | White Chalk Subgroup - Chalk |
| 20M 0165y to 20M 0385y | Diamicton | Clay-With-Flints | Grey Chalk Subgroup - Chalk |
| 20M 0385y to 20M 0715y | Grey Chalk Subgroup - Chalk | ||
| 20M 0715y to 21M 0495y | Gault Formation and Upper Greensand Formation Ⓤ - Mudstone, Sandstone and Limestone | ||
| 21M 0495y to 21M 1375y | Lower Greensand Group - Sandstone and Mudstone | ||
| 21M 1375y to 22M 0825y | Sand and Gravel | River Terrace Deposits Ⓤ | Lower Greensand Group - Sandstone and Mudstone |
| 22M 0825y to 23M 0347y | Lower Greensand Group - Sandstone and Mudstone |