Geology for ELR HAH1 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 |
|---|---|---|---|
| 0M -573y to 0M 1667y | Clay | Lacustrine Deposits Ⓤ | Triassic Rocks Ⓤ - Sandstone and Conglomerate, Interbedded |