Geology for ELR ECM9 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 -086y to 0M 0495y | Inverclyde Group - Sandstone, Siltstone and Mudstone | ||
| 0M 0495y to 0M 0700y | Unnamed Extrusive Rocks, Dinantian - Mafic Lava and Mafic Tuff |