See detailed information for ELR OBN2
⚠️ Geology shown below is based on British Geological Survey (BGS) low-resolution data sampled at 100 metre intervals along the ELR. The geology relative to the mileages should not be treated as accurate or complete. Data marked with Ⓤ is classed as undifferentiated by the BGS.
| Mileage | Material | Deposit | Bedrock |
|---|---|---|---|
| 30M 0454y to 30M 1155y | Diamicton | Till | Southern Highland Group - Psammite and Pelite |
| 30M 1155y to 30M 1705y | Diamicton | Till | Argyll Group - Metalimestone |
| 30M 1705y to 35M 0715y | Diamicton | Till | Argyll Group - Psammite, Semipelite and Pelite |
| 35M 0715y to 36M 1155y | Diamicton | Till | Grampian Group - Psammite and Semipelite |
| 36M 1155y to 38M 0935y | Diamicton | Till | Appin Group - Graphitic Pelite, Calcareous Pelite, Calcsilicate-rock and Psammite |
| 38M 0935y to 40M 0825y | Diamicton | Till | Grampian Group - Psammite and Semipelite |
| 40M 0825y to 41M 1045y | Diamicton | Till | Appin Group - Quartzite |
| 41M 1045y to 42M 0165y | Diamicton | Till | Appin Group - Graphitic Pelite, Calcareous Pelite, Calcsilicate-rock and Psammite |
| 42M 0165y to 43M 0385y | Diamicton | Till | Argyll Group - Quartzite |
| 43M 0385y to 46M 1045y | Diamicton | Till | Argyll Group - Psammite, Semipelite and Pelite |
| 46M 1045y to 48M 1045y | Clay, Silt and Sand | Alluvium | Argyll Group - Psammite, Semipelite and Pelite |
| 48M 1045y to 48M 1265y | Diamicton | Till | Argyll Group - Psammite, Semipelite and Pelite |
| 48M 1265y to 49M 0715y | Diamicton | Till | Appin Group - Quartzite |
| 49M 0715y to 49M 1045y | Appin Group - Quartzite | ||
| 49M 1045y to 50M 0385y | Appin Group - Graphitic Pelite, Calcareous Pelite, Calcsilicate-rock and Psammite | ||
| 50M 0385y to 55M 1045y | Argyll Group - Psammite, Semipelite and Pelite | ||
| 55M 1045y to 55M 1485y | Unnamed Extrusive Rocks, Silurian to Devonian - Felsic Lava and Felsic Tuff | ||
| 55M 1485y to 57M 0165y | Unnamed Extrusive Rocks, Silurian to Devonian - Mafic Lava and Mafic Tuff | ||
| 57M 0165y to 57M 0495y | Argyll Group - Psammite, Semipelite and Pelite | ||
| 57M 0495y to 57M 1045y | Sand and Gravel | Raised Marine Deposits Ⓤ | Argyll Group - Psammite, Semipelite and Pelite |
| 57M 1045y to 59M 0165y | Sand and Gravel | Raised Marine Deposits Ⓤ | Unnamed Extrusive Rocks, Silurian to Devonian - Mafic Lava and Mafic Tuff |
| 59M 0165y to 60M 0935y | Unnamed Extrusive Rocks, Silurian to Devonian - Mafic Lava and Mafic Tuff | ||
| 60M 0935y to 60M 1375y | Sand and Gravel | Raised Marine Deposits Ⓤ | Unnamed Extrusive Rocks, Silurian to Devonian - Mafic Lava and Mafic Tuff |
| 60M 1375y to 60M 1705y | Unnamed Extrusive Rocks, Silurian to Devonian - Mafic Lava and Mafic Tuff | ||
| 60M 1705y to 61M 0165y | |||
| 61M 0165y to 61M 0825y | Unnamed Extrusive Rocks, Silurian to Devonian - Mafic Lava and Mafic Tuff | ||
| 61M 0825y to 62M 0385y | |||
| 62M 0385y to 63M 0605y | Unnamed Extrusive Rocks, Silurian to Devonian - Mafic Lava and Mafic Tuff | ||
| 63M 0605y to 63M 1265y | Sand and Gravel | Raised Marine Deposits Ⓤ | Unnamed Extrusive Rocks, Silurian to Devonian - Mafic Lava and Mafic Tuff |
| 63M 1265y to 64M 1265y | Unnamed Extrusive Rocks, Silurian to Devonian - Mafic Lava and Mafic Tuff | ||
| 64M 1265y to 65M 0165y | Sand and Gravel | Glacial Sand and Gravel | |
| 65M 0165y to 66M 0055y | Sand and Gravel | Glacial Sand and Gravel | Unnamed Extrusive Rocks, Silurian to Devonian - Mafic Lava and Mafic Tuff |
| 66M 0055y to 67M 0275y | Unnamed Extrusive Rocks, Silurian to Devonian - Mafic Lava and Mafic Tuff | ||
| 67M 0275y to 67M 0935y | Argyll Group - Psammite, Semipelite and Pelite | ||
| 67M 0935y to 69M 0715y | Unnamed Extrusive Rocks, Silurian to Devonian - Mafic Lava and Mafic Tuff | ||
| 69M 0715y to 69M 0825y | Sand and Gravel | Raised Marine Deposits Ⓤ | Unnamed Extrusive Rocks, Silurian to Devonian - Mafic Lava and Mafic Tuff |
| 69M 0825y to 69M 1705y | Sand and Gravel | Raised Marine Deposits Ⓤ | Argyll Group - Psammite, Semipelite and Pelite |
| 69M 1705y to 70M 0605y | Argyll Group - Psammite, Semipelite and Pelite | ||
| 70M 0605y to 71M 0055y | Sand and Gravel | Raised Marine Deposits Ⓤ | Argyll Group - Psammite, Semipelite and Pelite |
| 71M 0055y to 71M 1087y | Argyll Group - Psammite, Semipelite and Pelite |