See detailed information for ELR LLA
⚠️ 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 -204y to 0M 0275y | Clay, Silt and Sand | Alluvium | South Wales Upper Coal Measures Formation - Mudstone, Siltstone, Sandstone, Coal, Ironstone and Ferricrete |
| 0M 0275y to 2M 0165y | Diamicton | Till | South Wales Upper Coal Measures Formation - Mudstone, Siltstone, Sandstone, Coal, Ironstone and Ferricrete |
| 2M 0165y to 2M 1595y | Clay, Silt and Sand | Alluvium | |
| 2M 1595y to 3M 0605y | Clay, Silt and Sand | Alluvium | South Wales Upper Coal Measures Formation - Mudstone, Siltstone, Sandstone, Coal, Ironstone and Ferricrete |
| 3M 0605y to 3M 0935y | Diamicton | Till | South Wales Upper Coal Measures Formation - Mudstone, Siltstone, Sandstone, Coal, Ironstone and Ferricrete |
| 3M 0935y to 3M 1375y | Clay, Silt and Sand | Alluvium | South Wales Upper Coal Measures Formation - Mudstone, Siltstone, Sandstone, Coal, Ironstone and Ferricrete |
| 3M 1375y to 4M 0715y | Sand and Gravel | Glacial Sand and Gravel | South Wales Upper Coal Measures Formation - Mudstone, Siltstone, Sandstone, Coal, Ironstone and Ferricrete |
| 4M 0715y to 4M 1045y | Clay, Silt and Sand | Alluvium | South Wales Upper Coal Measures Formation - Mudstone, Siltstone, Sandstone, Coal, Ironstone and Ferricrete |
| 4M 1045y to 5M 0055y | South Wales Upper Coal Measures Formation - Mudstone, Siltstone, Sandstone, Coal, Ironstone and Ferricrete | ||
| 5M 0055y to 5M 0495y | Clay, Silt and Sand | Alluvium | South Wales Upper Coal Measures Formation - Mudstone, Siltstone, Sandstone, Coal, Ironstone and Ferricrete |
| 5M 0495y to 6M 0165y | Sand and Gravel | Glacial Sand and Gravel | South Wales Upper Coal Measures Formation - Mudstone, Siltstone, Sandstone, Coal, Ironstone and Ferricrete |
| 6M 0165y to 9M 1155y | Clay, Silt and Sand | Alluvium | South Wales Upper Coal Measures Formation - Mudstone, Siltstone, Sandstone, Coal, Ironstone and Ferricrete |
| 9M 1155y to 11M 0825y | Clay, Silt and Sand | Alluvium | Pennine Middle Coal Measures Formation and South Wales Middle Coal Measures Formation Ⓤ |
| 11M 0825y to 11M 1045y | Clay, Silt and Sand | Alluvium | Pennine Lower Coal Measures Formation and South Wales Lower Coal Measures Formation Ⓤ |
| 11M 1045y to 13M 0495y | Diamicton | Till | Pennine Lower Coal Measures Formation and South Wales Lower Coal Measures Formation Ⓤ |
| 13M 0495y to 13M 0715y | Diamicton | Till | Millstone Grit Group - Mudstone, Siltstone and Sandstone |
| 13M 0715y to 13M 1155y | Sand and Gravel | Glacial Sand and Gravel | Millstone Grit Group - Mudstone, Siltstone and Sandstone |
| 13M 1155y to 13M 1375y | Sand and Gravel | Glacial Sand and Gravel | Dinantian Rocks Ⓤ - Limestone with Subordinate Sandstone and Argillaceous Rocks |
| 13M 1375y to 13M 1485y | Diamicton | Till | Dinantian Rocks Ⓤ - Limestone with Subordinate Sandstone and Argillaceous Rocks |
| 13M 1485y to 14M 0715y | Diamicton | Till | Lower Devonian Rocks Ⓤ - Sandstone and Conglomerate, Interbedded |
| 14M 0715y to 14M 1485y | Diamicton | Till | Lower Devonian Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 14M 1485y to 14M 1705y | Diamicton | Till | Pridoli Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 14M 1705y to 15M 0275y | Pridoli Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 15M 0275y to 15M 0495y | Diamicton | Till | Pridoli Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 15M 0495y to 15M 1045y | Diamicton | Till | Ludlow Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 15M 1045y to 15M 1265y | Ludlow Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 15M 1265y to 16M 0385y | Wenlock Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 16M 0385y to 16M 1375y | Llanvirn Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 16M 1375y to 16M 1595y | Diamicton | Till | Llanvirn Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 16M 1595y to 18M 0055y | Clay, Silt and Sand | Alluvium | Llanvirn Rocks Ⓤ - Mudstone, Siltstone and Sandstone |
| 18M 0055y to 18M 1265y | Llanvirn Rocks Ⓤ - Mudstone, Siltstone and Sandstone | ||
| 18M 1265y to 18M 1718y | Ashgill Rocks Ⓤ - Mudstone, Siltstone and Sandstone |