Geology for ELR HTM 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 |
|---|---|---|---|
| 67M 1445y to 69M 1236y | Clay | Lacustrine Deposits Ⓤ | Triassic Rocks Ⓤ - Sandstone and Conglomerate, Interbedded |