Geology for ELR CGJ4 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 |
|---|---|---|---|
| 185M 0982y to 185M 1485y | Clay, Silt and Sand | Alluvium | Triassic Rocks Ⓤ - Sandstone and Conglomerate, Interbedded |
| 185M 1485y to 185M 1705y | Sand and Gravel | River Terrace Deposits Ⓤ | Triassic Rocks Ⓤ - Sandstone and Conglomerate, Interbedded |
| 185M 1705y to 186M 0935y | Diamicton | Till | Triassic Rocks Ⓤ - Sandstone and Conglomerate, Interbedded |
| 186M 0935y to 187M 0605y | Triassic Rocks Ⓤ - Sandstone and Conglomerate, Interbedded | ||
| 187M 0605y to 187M 1045y | Sand and Gravel | Glacial Sand and Gravel | Triassic Rocks Ⓤ - Sandstone and Conglomerate, Interbedded |
| 187M 1045y to 187M 1155y | Sand and Gravel | Glacial Sand and Gravel | Permian Rocks Ⓤ - Sandstone and Conglomerate, Interbedded |
| 187M 1155y to 187M 1725y | Diamicton | Till | Permian Rocks Ⓤ - Sandstone and Conglomerate, Interbedded |