Geology for ELR BID 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 -004y to 0M 0495y | Sand and Gravel | Raised Marine Deposits Ⓤ | Strathclyde Group - Sedimentary Rock Cycles, Strathclyde Group Type |
| 0M 0495y to 0M 0605y | Sand and Gravel | Raised Marine Deposits Ⓤ | |
| 0M 0605y to 0M 0729y | Sand and Gravel | Raised Marine Deposits Ⓤ | Strathclyde Group - Sedimentary Rock Cycles, Strathclyde Group Type |