Geology for ELR BJR 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.

MileageMaterialDepositBedrock
0M -181y to 0M -146yClay, Silt and SandAlluviumPridoli Rocks Ⓤ - Mudstone, Siltstone and Sandstone
0M -146y to 0M 0275yDiamictonTillPridoli Rocks Ⓤ - Mudstone, Siltstone and Sandstone
0M 0275y to 0M 1595yClay, Silt and SandAlluviumPridoli Rocks Ⓤ - Mudstone, Siltstone and Sandstone
0M 1595y to 1M 1265yDiamictonTillPridoli Rocks Ⓤ - Mudstone, Siltstone and Sandstone
1M 1265y to 2M 0605yDiamictonTillLower Devonian Rocks Ⓤ - Mudstone, Siltstone and Sandstone
2M 0605y to 2M 1705yLower Devonian Rocks Ⓤ - Mudstone, Siltstone and Sandstone
2M 1705y to 3M 0275yLower Devonian Rocks Ⓤ - Sandstone and Conglomerate, Interbedded
3M 0275y to 3M 0605yUpper Devonian Rocks Ⓤ - Sandstone and Conglomerate, Interbedded
3M 0605y to 3M 0935yDinantian Rocks Ⓤ - Limestone with Subordinate Sandstone and Argillaceous Rocks
3M 0935y to 3M 1705yUpper Devonian Rocks Ⓤ - Sandstone and Conglomerate, Interbedded
3M 1705y to 4M 0275yDinantian Rocks Ⓤ - Limestone with Subordinate Sandstone and Argillaceous Rocks
4M 0275y to 4M 0495yMillstone Grit Group [See Also Migr] - Mudstone, Siltstone and Sandstone
4M 0495y to 4M 0825yPennine Lower Coal Measures Formation and South Wales Lower Coal Measures Formation Ⓤ
4M 0825y to 4M 1265yPennine Middle Coal Measures Formation and South Wales Middle Coal Measures Formation Ⓤ
4M 1265y to 4M 1620ySouth Wales Upper Coal Measures Formation - Mudstone, Siltstone, Sandstone, Coal, Ironstone and Ferricrete