Geology for ELR WHL 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 -028y to 0M 1485y | Sand and Gravel | Raised Marine Deposits Ⓤ | Inverclyde Group - Sandstone, Siltstone and Mudstone |
| 0M 1485y to 2M 1595y | Diamicton | Till | Inverclyde Group - Sandstone, Siltstone and Mudstone |
| 2M 1595y to 3M 0385y | Diamicton | Till | Southern Highland Group - Psammite and Pelite |
| 3M 0385y to 4M 0165y | Southern Highland Group - Psammite and Pelite | ||
| 4M 0165y to 4M 0495y | Diamicton | Till | Southern Highland Group - Psammite and Pelite |
| 4M 0495y to 4M 1375y | Diamicton | Till | Southern Highland Group - Pelite |
| 4M 1375y to 7M 1705y | Diamicton | Till | Southern Highland Group - Psammite and Pelite |
| 7M 1705y to 9M 0385y | Southern Highland Group - Psammite and Pelite | ||
| 9M 0385y to 9M 1705y | Diamicton | Till | Southern Highland Group - Psammite and Pelite |
| 9M 1705y to 11M 0385y | Southern Highland Group - Psammite and Pelite | ||
| 11M 0385y to 11M 1375y | Diamicton | Till | Southern Highland Group - Psammite and Pelite |
| 11M 1375y to 11M 1595y | Southern Highland Group - Psammite and Pelite | ||
| 11M 1595y to 11M 1705y | Diamicton | Till | Southern Highland Group - Psammite and Pelite |
| 11M 1705y to 18M 0275y | Southern Highland Group - Psammite and Pelite | ||
| 18M 0275y to 21M 0385y | Diamicton | Till | Southern Highland Group - Psammite and Pelite |
| 21M 0385y to 21M 0825y | Southern Highland Group - Psammite and Pelite | ||
| 21M 0825y to 22M 1045y | Southern Highland Group - Psammite and Pelite | ||
| 22M 1045y to 23M 1045y | Diamicton | Till | Southern Highland Group - Psammite and Pelite |
| 23M 1045y to 24M 1045y | Southern Highland Group - Psammite and Pelite | ||
| 24M 1045y to 25M 0165y | Diamicton | Till | Southern Highland Group - Psammite and Pelite |
| 25M 0165y to 26M 1155y | Southern Highland Group - Psammite and Pelite | ||
| 26M 1155y to 27M 0825y | Diamicton | Till | Southern Highland Group - Psammite and Pelite |
| 27M 0825y to 31M 0055y | Southern Highland Group - Psammite and Pelite | ||
| 31M 0055y to 31M 0715y | Diamicton | Till | Southern Highland Group - Psammite and Pelite |
| 31M 0715y to 34M 1155y | Southern Highland Group - Psammite and Pelite | ||
| 34M 1155y to 37M 1045y | Diamicton | Till | Southern Highland Group - Psammite and Pelite |
| 37M 1045y to 37M 1375y | Diamicton | Till | Argyll Group - Metalimestone |
| 37M 1375y to 42M 0605y | Diamicton | Till | Argyll Group - Psammite, Semipelite and Pelite |
| 42M 0605y to 45M 1045y | Diamicton | Till | Grampian Group - Psammite and Semipelite |
| 45M 1045y to 45M 1595y | Grampian Group - Psammite and Semipelite | ||
| 45M 1595y to 51M 0715y | Diamicton | Till | Grampian Group - Psammite and Semipelite |
| 51M 0715y to 53M 1595y | Clay, Silt and Sand | Alluvium | Grampian Group - Psammite and Semipelite |
| 53M 1595y to 54M 1485y | Diamicton | Till | Grampian Group - Psammite and Semipelite |
| 54M 1485y to 55M 0825y | Sand and Gravel | Glacial Sand and Gravel | Grampian Group - Psammite and Semipelite |
| 55M 0825y to 57M 0055y | Sand and Gravel | Glacial Sand and Gravel | Unnamed Igneous Intrusion, Late Silurian to Early Devonian - Felsic-Rock |
| 57M 0055y to 57M 1485y | Diamicton | Till | Unnamed Igneous Intrusion, Late Silurian to Early Devonian - Felsic-Rock |
| 57M 1485y to 59M 1595y | Peat | Peat | Unnamed Igneous Intrusion, Late Silurian to Early Devonian - Felsic-Rock |
| 59M 1595y to 60M 0275y | Diamicton | Till | Unnamed Igneous Intrusion, Late Silurian to Early Devonian - Felsic-Rock |
| 60M 0275y to 60M 1045y | Unnamed Igneous Intrusion, Late Silurian to Early Devonian - Felsic-Rock | ||
| 60M 1045y to 63M 0605y | Diamicton | Till | Unnamed Igneous Intrusion, Late Silurian to Early Devonian - Felsic-Rock |
| 63M 0605y to 63M 1155y | Unnamed Igneous Intrusion, Late Silurian to Early Devonian - Felsic-Rock | ||
| 63M 1155y to 63M 1485y | Diamicton | Till | Unnamed Igneous Intrusion, Late Silurian to Early Devonian - Felsic-Rock |
| 63M 1485y to 64M 1045y | Unnamed Igneous Intrusion, Late Silurian to Early Devonian - Felsic-Rock | ||
| 64M 1045y to 65M 1485y | Diamicton | Till | Unnamed Igneous Intrusion, Late Silurian to Early Devonian - Felsic-Rock |
| 65M 1485y to 66M 1155y | Peat | Peat | Unnamed Igneous Intrusion, Late Silurian to Early Devonian - Felsic-Rock |
| 66M 1155y to 68M 1155y | Diamicton | Till | Unnamed Igneous Intrusion, Late Silurian to Early Devonian - Felsic-Rock |
| 68M 1155y to 71M 0605y | Peat | Peat | Unnamed Igneous Intrusion, Late Silurian to Early Devonian - Felsic-Rock |
| 71M 0605y to 71M 1155y | Peat | Peat | Appin Group - Graphitic Pelite, Calcareous Pelite, Calcsilicate-Rock and Psammite |
| 71M 1155y to 71M 1595y | Peat | Peat | Grampian Group - Psammite and Semipelite |
| 71M 1595y to 74M 1045y | Diamicton | Till | Grampian Group - Psammite and Semipelite |
| 74M 1045y to 75M 0275y | Grampian Group - Psammite and Semipelite | ||
| 75M 0275y to 76M 0165y | Diamicton | Till | Grampian Group - Psammite and Semipelite |
| 76M 0165y to 76M 0605y | Grampian Group - Psammite and Semipelite | ||
| 76M 0605y to 76M 1375y | Diamicton | Till | Grampian Group - Psammite and Semipelite |
| 76M 1375y to 77M 0385y | Grampian Group - Psammite and Semipelite | ||
| 77M 0385y to 77M 1265y | Appin Group - Graphitic Pelite, Calcareous Pelite, Calcsilicate-Rock and Psammite | ||
| 77M 1265y to 78M 0055y | Appin Group - Graphitic Pelite, Calcareous Pelite, Calcsilicate-Rock and Psammite | ||
| 78M 0055y to 78M 1045y | Appin Group - Graphitic Pelite, Calcareous Pelite, Calcsilicate-Rock and Psammite | ||
| 78M 1045y to 78M 1595y | Diamicton | Till | Appin Group - Graphitic Pelite, Calcareous Pelite, Calcsilicate-Rock and Psammite |
| 78M 1595y to 79M 0385y | Appin Group - Graphitic Pelite, Calcareous Pelite, Calcsilicate-Rock and Psammite | ||
| 79M 0385y to 80M 0275y | Diamicton | Till | Appin Group - Graphitic Pelite, Calcareous Pelite, Calcsilicate-Rock and Psammite |
| 80M 0275y to 80M 0495y | Sand and Gravel | Glacial Sand and Gravel | Appin Group - Graphitic Pelite, Calcareous Pelite, Calcsilicate-Rock and Psammite |
| 80M 0495y to 80M 1045y | Sand and Gravel | Glacial Sand and Gravel | Unnamed Igneous Intrusion, Late Silurian to Early Devonian - Felsic-Rock |
| 80M 1045y to 81M 0715y | Clay, Silt and Sand | Alluvium | Unnamed Igneous Intrusion, Late Silurian to Early Devonian - Felsic-Rock |
| 81M 0715y to 82M 0275y | Diamicton | Till | Unnamed Igneous Intrusion, Late Silurian to Early Devonian - Felsic-Rock |
| 82M 0275y to 84M 0825y | Diamicton | Till | Grampian Group - Psammite and Semipelite |
| 84M 0825y to 86M 1485y | Diamicton | Till | Appin Group - Graphitic Pelite, Calcareous Pelite, Calcsilicate-Rock and Psammite |
| 86M 1485y to 87M 0385y | Clay, Silt and Sand | Alluvium | Appin Group - Graphitic Pelite, Calcareous Pelite, Calcsilicate-Rock and Psammite |
| 87M 0385y to 87M 0495y | Clay, Silt and Sand | Alluvium | Appin Group - Metalimestone |
| 87M 0495y to 87M 0935y | Clay, Silt and Sand | Alluvium | Appin Group - Graphitic Pelite, Calcareous Pelite, Calcsilicate-Rock and Psammite |
| 87M 0935y to 87M 1045y | Diamicton | Till | Appin Group - Graphitic Pelite, Calcareous Pelite, Calcsilicate-Rock and Psammite |
| 87M 1045y to 87M 1155y | Sand and Gravel | Glacial Sand and Gravel | Appin Group - Graphitic Pelite, Calcareous Pelite, Calcsilicate-Rock and Psammite |
| 87M 1155y to 88M 0055y | Clay, Silt and Sand | Alluvium | Appin Group - Graphitic Pelite, Calcareous Pelite, Calcsilicate-Rock and Psammite |
| 88M 0055y to 88M 1375y | Sand and Gravel | Glacial Sand and Gravel | Appin Group - Graphitic Pelite, Calcareous Pelite, Calcsilicate-Rock and Psammite |
| 88M 1375y to 89M 0935y | Sand and Gravel | Glacial Sand and Gravel | Appin Group - Metalimestone |
| 89M 0935y to 89M 1485y | Sand and Gravel | Glacial Sand and Gravel | Appin Group - Quartzite |
| 89M 1485y to 91M 1045y | Sand and Gravel | Glacial Sand and Gravel | Grampian Group - Psammite and Semipelite |
| 91M 1045y to 91M 1155y | Diamicton | Till | Grampian Group - Psammite and Semipelite |
| 91M 1155y to 92M 0715y | Peat | Peat | Grampian Group - Psammite and Semipelite |
| 92M 0715y to 93M 0605y | Diamicton | Till | Grampian Group - Psammite and Semipelite |
| 93M 0605y to 94M 0605y | Sand and Gravel | Glacial Sand and Gravel | Grampian Group - Psammite and Semipelite |
| 94M 0605y to 94M 1705y | Diamicton | Till | Grampian Group - Psammite and Semipelite |
| 94M 1705y to 95M 1595y | Peat | Peat | Grampian Group - Psammite and Semipelite |
| 95M 1595y to 96M 0825y | Sand and Gravel | Glacial Sand and Gravel | Grampian Group - Psammite and Semipelite |
| 96M 0825y to 97M 0275y | Diamicton | Till | Grampian Group - Psammite and Semipelite |
| 97M 0275y to 97M 0825y | Grampian Group - Psammite and Semipelite | ||
| 97M 0825y to 98M 1155y | Sand and Gravel | Raised Marine Deposits Ⓤ | Grampian Group - Psammite and Semipelite |
| 98M 1155y to 99M 0825y | Grampian Group - Psammite and Semipelite | ||
| 99M 0825y to 99M 0928y |