Geology for ELR SJM1 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 |
|---|---|---|---|
| 166M 1121y to 167M 0379y | Pennine Middle Coal Measures Formation and South Wales Middle Coal Measures Formation Ⓤ |