Geology for ELR RHD1 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 -001y to 0M 1375y | Diamicton | Till | Unnamed Igneous Intrusion, Carboniferous to Permian - Dolerite and Tholeiitic Basalt |
| 0M 1375y to 1M 0101y | Unnamed Igneous Intrusion, Carboniferous to Permian - Dolerite and Tholeiitic Basalt |