Geology for ELR SMJ3 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 |
|---|---|---|---|
| 15M 0024y to 15M 0275y | Zechstein Group - Dolomitised Limestone and Dolomite | ||
| 15M 0275y to 16M 0055y | Permian Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 16M 0055y to 16M 1519y | Zechstein Group - Dolomitised Limestone and Dolomite |