Geology for ELR EGM3 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 0159y to 0M 1045y | Inverclyde Group - Sandstone, Siltstone and Mudstone | ||
| 0M 1045y to 0M 1265y | Diamicton | Till | Inverclyde Group - Sandstone, Siltstone and Mudstone |
| 0M 1265y to 1M 0477y | Diamicton | Till | Strathclyde Group - Sedimentary Rock Cycles, Strathclyde Group Type |