Geology for ELR NTM3 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 |
|---|---|---|---|
| 66M 0431y to 66M 1393y | Lias Group - Mudstone, Siltstone, Limestone and Sandstone |