Geology for ELR BGK 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
1M 0076y to 3M 1595ySand and GravelRiver Terrace Deposits ⓊThames Group - Clay, Silt, Sand and Gravel
3M 1595y to 4M 1155yClay, Silt and SandAlluviumThames Group - Clay, Silt, Sand and Gravel
4M 1155y to 5M 0165yThames Group - Clay, Silt, Sand and Gravel
5M 0165y to 5M 1155yClay, Silt and SandAlluviumThames Group - Clay, Silt, Sand and Gravel
5M 1155y to 12M 1705ySand and GravelRiver Terrace Deposits ⓊThames Group - Clay, Silt, Sand and Gravel
12M 1705y to 14M 1375yClay, Silt and SandAlluviumThames Group - Clay, Silt, Sand and Gravel
14M 1375y to 14M 1595ySand and GravelRiver Terrace Deposits ⓊThames Group - Clay, Silt, Sand and Gravel
14M 1595y to 15M 0825yClay, Silt and SandAlluviumThames Group - Clay, Silt, Sand and Gravel
15M 0825y to 16M 0605ySand and GravelRiver Terrace Deposits ⓊThames Group - Clay, Silt, Sand and Gravel
16M 0605y to 16M 1705yClay, Silt and SandAlluviumThames Group - Clay, Silt, Sand and Gravel
16M 1705y to 17M 1485yClay, Silt and SandAlluviumLambeth Group - Clay, Silt, Sand and Gravel
17M 1485y to 18M 1265yClay, Silt and SandAlluviumWhite Chalk Subgroup - Chalk
18M 1265y to 18M 1705ySand and GravelRiver Terrace Deposits ⓊWhite Chalk Subgroup - Chalk
18M 1705y to 19M 1265yClay, Silt and SandAlluviumWhite Chalk Subgroup - Chalk
19M 1265y to 20M 1595yClay, Silt and SandAlluviumLambeth Group - Clay, Silt, Sand and Gravel
20M 1595y to 21M 0495yDiamictonTillLambeth Group - Clay, Silt, Sand and Gravel
21M 0495y to 21M 0825yDiamictonTillThames Group - Clay, Silt, Sand and Gravel
21M 0825y to 21M 1375yDiamictonTillLambeth Group - Clay, Silt, Sand and Gravel
21M 1375y to 22M 0165yClay, Silt and SandAlluviumLambeth Group - Clay, Silt, Sand and Gravel
22M 0165y to 24M 0715yClay, Silt and SandAlluviumThames Group - Clay, Silt, Sand and Gravel
24M 0715y to 24M 1595yClay, Silt and SandAlluviumLambeth Group - Clay, Silt, Sand and Gravel
24M 1595y to 25M 0715ySand and GravelGlacial Sand and GravelWhite Chalk Subgroup - Chalk
25M 0715y to 27M 1375ySand and GravelGlacial Sand and GravelLambeth Group - Clay, Silt, Sand and Gravel
27M 1375y to 29M 1375ySand and GravelGlacial Sand and GravelWhite Chalk Subgroup - Chalk
29M 1375y to 31M 0055yDiamictonTillWhite Chalk Subgroup - Chalk
31M 0055y to 33M 0935ySand and GravelGlacial Sand and GravelWhite Chalk Subgroup - Chalk
33M 0935y to 33M 1155ySand and GravelGlacial Sand and GravelLambeth Group - Clay, Silt, Sand and Gravel
33M 1155y to 34M 0165yDiamictonTillLambeth Group - Clay, Silt, Sand and Gravel
34M 0165y to 34M 1485ySand and GravelGlacial Sand and GravelLambeth Group - Clay, Silt, Sand and Gravel
34M 1485y to 35M 0165yDiamictonTillLambeth Group - Clay, Silt, Sand and Gravel
35M 0165y to 35M 0825yDiamictonTillThames Group - Clay, Silt, Sand and Gravel
35M 0825y to 35M 1045ySand and GravelGlacial Sand and GravelLambeth Group - Clay, Silt, Sand and Gravel
35M 1045y to 35M 1155yDiamictonTillLambeth Group - Clay, Silt, Sand and Gravel
35M 1155y to 36M 0275yDiamictonTillWhite Chalk Subgroup - Chalk
36M 0275y to 36M 0825ySand and GravelGlacial Sand and GravelWhite Chalk Subgroup - Chalk
36M 0825y to 37M 1705yDiamictonTillWhite Chalk Subgroup - Chalk
37M 1705y to 38M 0935ySand and GravelGlacial Sand and GravelWhite Chalk Subgroup - Chalk
38M 0935y to 40M 1265yDiamictonTillWhite Chalk Subgroup - Chalk
40M 1265y to 44M 0275yWhite Chalk Subgroup - Chalk
44M 0275y to 45M 1265yClay, Silt and SandAlluviumWhite Chalk Subgroup - Chalk
45M 1265y to 47M 0055yWhite Chalk Subgroup - Chalk
47M 0055y to 47M 1705yClay, Silt and SandAlluviumWhite Chalk Subgroup - Chalk
47M 1705y to 48M 0165yWhite Chalk Subgroup - Chalk
48M 0165y to 49M 1595yClay, Silt and SandAlluviumWhite Chalk Subgroup - Chalk
49M 1595y to 50M 0605yClay, Silt and SandAlluviumGrey Chalk Subgroup - Chalk
50M 0605y to 50M 1485yGrey Chalk Subgroup - Chalk
50M 1485y to 51M 0165yClay, Silt and SandAlluviumGrey Chalk Subgroup - Chalk
51M 0165y to 51M 0495yGrey Chalk Subgroup - Chalk
51M 0495y to 51M 1265ySand and GravelRiver Terrace Deposits ⓊGrey Chalk Subgroup - Chalk
51M 1265y to 51M 1595yClay, Silt and SandAlluviumGrey Chalk Subgroup - Chalk
51M 1595y to 52M 0715ySand and GravelRiver Terrace Deposits ⓊGrey Chalk Subgroup - Chalk
52M 0715y to 54M 0385yGrey Chalk Subgroup - Chalk
54M 0385y to 55M 1595ySand and GravelRiver Terrace Deposits ⓊGrey Chalk Subgroup - Chalk
55M 1595y to 57M 0055yGrey Chalk Subgroup - Chalk
57M 0055y to 57M 0495yClay, Silt and SandAlluviumGrey Chalk Subgroup - Chalk
57M 0495y to 57M 0715yClay, Silt and SandAlluviumGault Formation and Upper Greensand Formation Ⓤ - Mudstone, Sandstone and Limestone
57M 0715y to 61M 0715ySand and GravelRiver Terrace Deposits ⓊGault Formation and Upper Greensand Formation Ⓤ - Mudstone, Sandstone and Limestone
61M 0715y to 63M 0385yGault Formation and Upper Greensand Formation Ⓤ - Mudstone, Sandstone and Limestone
63M 0385y to 65M 1375yPeatPeatGault Formation and Upper Greensand Formation Ⓤ - Mudstone, Sandstone and Limestone
65M 1375y to 66M 1485yPeatPeatLower Greensand Group - Sandstone and Mudstone
66M 1485y to 66M 1595yPeatPeatWest Walton Formation, Ampthill Clay Formation and Kimmeridge Clay Formation Ⓤ - Mudstone
66M 1595y to 68M 0165yClay, Silt and SandAlluviumWest Walton Formation, Ampthill Clay Formation and Kimmeridge Clay Formation Ⓤ - Mudstone
68M 0165y to 68M 0605yWest Walton Formation, Ampthill Clay Formation and Kimmeridge Clay Formation Ⓤ - Mudstone
68M 0605y to 69M 1485yPeatPeatWest Walton Formation, Ampthill Clay Formation and Kimmeridge Clay Formation Ⓤ - Mudstone
69M 1485y to 70M 0385yWest Walton Formation, Ampthill Clay Formation and Kimmeridge Clay Formation Ⓤ - Mudstone
70M 0385y to 71M 0935yPeatPeatWest Walton Formation, Ampthill Clay Formation and Kimmeridge Clay Formation Ⓤ - Mudstone
71M 0935y to 72M 0165yWest Walton Formation, Ampthill Clay Formation and Kimmeridge Clay Formation Ⓤ - Mudstone
72M 0165y to 72M 1595yPeatPeatWest Walton Formation, Ampthill Clay Formation and Kimmeridge Clay Formation Ⓤ - Mudstone
72M 1595y to 73M 0385yDiamictonTillWest Walton Formation, Ampthill Clay Formation and Kimmeridge Clay Formation Ⓤ - Mudstone
73M 0385y to 75M 1485yPeatPeatWest Walton Formation, Ampthill Clay Formation and Kimmeridge Clay Formation Ⓤ - Mudstone
75M 1485y to 76M 1375yClay, Silt and SandAlluviumWest Walton Formation, Ampthill Clay Formation and Kimmeridge Clay Formation Ⓤ - Mudstone
76M 1375y to 78M 0495yPeatPeatWest Walton Formation, Ampthill Clay Formation and Kimmeridge Clay Formation Ⓤ - Mudstone
78M 0495y to 79M 0605yWest Walton Formation, Ampthill Clay Formation and Kimmeridge Clay Formation Ⓤ - Mudstone
79M 0605y to 83M 0605yPeatPeatWest Walton Formation, Ampthill Clay Formation and Kimmeridge Clay Formation Ⓤ - Mudstone
83M 0605y to 86M 1485yWest Walton Formation, Ampthill Clay Formation and Kimmeridge Clay Formation Ⓤ - Mudstone
86M 1485y to 89M 1595ySand and GravelRiver Terrace Deposits ⓊWest Walton Formation, Ampthill Clay Formation and Kimmeridge Clay Formation Ⓤ - Mudstone
89M 1595y to 90M 0385yClay, Silt and SandAlluviumWest Walton Formation, Ampthill Clay Formation and Kimmeridge Clay Formation Ⓤ - Mudstone
90M 0385y to 90M 1485ySand and GravelRiver Terrace Deposits ⓊWest Walton Formation, Ampthill Clay Formation and Kimmeridge Clay Formation Ⓤ - Mudstone
90M 1485y to 97M 0157yClay, Silt and SandAlluviumWest Walton Formation, Ampthill Clay Formation and Kimmeridge Clay Formation Ⓤ - Mudstone