See detailed information for ELR SAW
⚠️ 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 |
|---|---|---|---|
| 0M -279y to 0M 0275y | Lias Group - Mudstone, Siltstone, Limestone and Sandstone | ||
| 0M 0275y to 0M 0715y | Triassic Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 0M 0715y to 1M 1265y | Tremadoc Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 1M 1265y to 1M 1595y | Clay, Silt and Sand | Alluvium | Tremadoc Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 1M 1595y to 2M 0055y | Tremadoc Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 2M 0055y to 2M 0385y | Ludlow Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 2M 0385y to 4M 1265y | Pridoli Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 4M 1265y to 5M 0715y | |||
| 5M 0715y to 5M 1265y | Pridoli Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 5M 1265y to 6M 1595y | Lower Devonian Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 6M 1595y to 7M 1595y | Sand and Gravel | River Terrace Deposits Ⓤ | Lower Devonian Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 7M 1595y to 8M 0605y | Clay, Silt and Sand | Alluvium | Lower Devonian Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 8M 0605y to 8M 0715y | Sand and Gravel | River Terrace Deposits Ⓤ | Lower Devonian Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 8M 0715y to 8M 1705y | Clay, Silt and Sand | Alluvium | Lower Devonian Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 8M 1705y to 9M 0385y | Lower Devonian Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 9M 0385y to 9M 1155y | Lower Devonian Rocks Ⓤ - Sandstone and Conglomerate, Interbedded | ||
| 9M 1155y to 18M 1364y | South Wales Upper Coal Measures Formation - Mudstone, Siltstone, Sandstone, Coal, Ironstone and Ferricrete |