Geology for ELR SUB2 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 0066y to 0M 0825y | Clay, Silt and Sand | Alluvium | Strathclyde Group - Sedimentary Rock Cycles, Strathclyde Group Type |
| 0M 0825y to 0M 1705y | Sand and Gravel | Glacial Sand and Gravel | Strathclyde Group - Sedimentary Rock Cycles, Strathclyde Group Type |
| 0M 1705y to 1M 0605y | Diamicton | Till | Strathclyde Group - Sedimentary Rock Cycles, Strathclyde Group Type |
| 1M 0605y to 1M 0825y | Diamicton | Till | Inverclyde Group - Sandstone, Siltstone and Mudstone |
| 1M 0825y to 1M 1045y | Inverclyde Group - Sandstone, Siltstone and Mudstone | ||
| 1M 1045y to 2M 1045y | Diamicton | Till | Inverclyde Group - Sandstone, Siltstone and Mudstone |
| 2M 1045y to 2M 1265y | Inverclyde Group - Sandstone, Siltstone and Mudstone | ||
| 2M 1265y to 3M 0605y | Unnamed Extrusive Rocks, Silurian to Devonian - Mafic Lava and Mafic Tuff | ||
| 3M 0605y to 3M 0825y | Diamicton | Till | Unnamed Extrusive Rocks, Silurian to Devonian - Mafic Lava and Mafic Tuff |
| 3M 0825y to 3M 1705y | Diamicton | Till | Inverclyde Group - Sandstone, Siltstone and Mudstone |
| 3M 1705y to 4M 0605y | Clay, Silt and Sand | Alluvium | Inverclyde Group - Sandstone, Siltstone and Mudstone |
| 4M 0605y to 5M 0275y | Inverclyde Group - Sandstone, Siltstone and Mudstone | ||
| 5M 0275y to 5M 0495y | Clay, Silt and Sand | Alluvium | Inverclyde Group - Sandstone, Siltstone and Mudstone |
| 5M 0495y to 5M 0605y | Inverclyde Group - Sandstone, Siltstone and Mudstone | ||
| 5M 0605y to 5M 1265y | Clay, Silt and Sand | Alluvium | Inverclyde Group - Sandstone, Siltstone and Mudstone |
| 5M 1265y to 5M 1375y | Diamicton | Till | Inverclyde Group - Sandstone, Siltstone and Mudstone |
| 5M 1375y to 6M 0055y | Diamicton | Till | Strathclyde Group - Sedimentary Rock Cycles, Strathclyde Group Type |
| 6M 0055y to 6M 1529y | Diamicton | Till | Clackmannan Group - Sedimentary Rock Cycles, Clackmannan Group Type |