Geology for ELR STR1 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 |
|---|---|---|---|
| 40M 0946y to 42M 0385y | Sand and Gravel | Raised Marine Deposits Ⓤ | Scottish Coal Measures Group - Mudstone, Siltstone, Sandstone, Coal, Ironstone and Ferricrete |
| 42M 0385y to 42M 0715y | Sand and Gravel | Raised Marine Deposits Ⓤ | Unnamed Extrusive Rocks, Silesian - Mafic Lava and Mafic Tuff |
| 42M 0715y to 42M 0825y | Diamicton | Till | Unnamed Extrusive Rocks, Silesian - Mafic Lava and Mafic Tuff |
| 42M 0825y to 45M 0275y | Diamicton | Till | Inverclyde Group - Sandstone, Siltstone and Mudstone |
| 45M 0275y to 51M 1375y | Diamicton | Till | Lanark Group - Sandstone and Conglomerate, Interbedded |
| 51M 1375y to 52M 1375y | Diamicton | Till | Inverclyde Group - Sandstone, Siltstone and Mudstone |
| 52M 1375y to 53M 0165y | Inverclyde Group - Sandstone, Siltstone and Mudstone | ||
| 53M 0165y to 53M 1265y | Strathclyde Group - Sedimentary Rock Cycles, Strathclyde Group Type | ||
| 53M 1265y to 55M 0715y | Diamicton | Till | Strathclyde Group - Sedimentary Rock Cycles, Strathclyde Group Type |
| 55M 0715y to 58M 1485y | Diamicton | Till | Clackmannan Group - Sedimentary Rock Cycles, Clackmannan Group Type |
| 58M 1485y to 58M 1595y | Diamicton | Till | Cambrian and Ordovician Rocks Ⓤ - Mafic Lava and Mafic Tuff |
| 58M 1595y to 59M 0165y | Diamicton | Till | Strathclyde Group - Sedimentary Rock Cycles, Strathclyde Group Type |
| 59M 0165y to 59M 0825y | Diamicton | Till | Inverclyde Group - Sandstone, Siltstone and Mudstone |
| 59M 0825y to 59M 1265y | Diamicton | Till | Cambrian and Ordovician Rocks Ⓤ - Mafic Lava and Mafic Tuff |
| 59M 1265y to 59M 1705y | Diamicton | Till | Inverclyde Group - Sandstone, Siltstone and Mudstone |
| 59M 1705y to 60M 1485y | Diamicton | Till | Lanark Group - Sandstone and Conglomerate, Interbedded |
| 60M 1485y to 61M 1327y | Sand and Gravel | Raised Marine Deposits Ⓤ | Lanark Group - Sandstone and Conglomerate, Interbedded |