| Lithostratigraphy |
| Order | Type | Group | Form-ati | Member | Description | Upper | Lower | Basin |
| By No. | on | Age | Age |
| 1.00 | SED | Sedimentary |
| 2.00 | WATR | Water | UD | SONS NONS CNSB IRSE |
| 3.00 | BOCL | Boulder Clay | QP | QH | SONS |
| 4.00 | YARM | Yarmouth Road Formation | Q |
| 5.00 | SNDA | Sands 'A' | GN | CNSB |
| 6.00 | SNDB | Sands 'B' |
| 7.00 | SNDC | Sands 'C' |
| 8.00 | SNDD | Sands 'D' |
| 9.00 | SNDE | Sands 'E' |
| 10.00 | SNDF | Sands 'F' |
| 11.00 | SNDG | Sands 'G' |
| 12.00 | GLAC | Glacial Clays and Gravels | SONS |
| 13.00 | ALFE | Alluvium and Fen Deposits | EMSH |
| 14.00 | NCG | Norwich Crag |
| 15.00 | PGRV | Plateau Gravels | WSXB |
| 16.00 | RMUD | Recent Mud and Silt | QH | SONS |
| 17.00 | MACA | Macauley Sequence | QP | QH | ROCK |
| 18.00 | MACL | Macleod Sequence |
| 19.00 | CHAN | Channel Series | SONS |
| 20.00 | ATLC | Atlantic Group | NM | QH | WESH |
| 21.00 | TDYK | Tertiary Dyke Group | GN | SONS |
| 22.00 | TVOL | Tertiary Volcanic Group | ROCK |
| 23.00 | TVUU | Upper Unit |
| 24.00 | TVLU | Lower Unit |
| 25.00 | FDYK | Fleetwood Dyke Complex | IRSE |
| 26.00 | TERT | Tertiary Group | SWAP CARD |
| 26.50 | GNSD | Undifferentiated Tertiary Sands | GE | NONS |
| 27.00 | LSUO | Oligocene Limestone/Sandstone U. | GO | SWAP |
| 28.00 | EOCS | Eocene Sands | GE | SVIG |
| 29.00 | MECL | Middle Eocene Claystone | GL | SWAP |
| 30.00 | MESA | Middle Eocene Sandstone |
| 31.00 | LUEO | Eocene Limestone Unit | GI | GB |
| 32.00 | CUEO | Eocene Claystone Unit | GZ | GI |
| 33.00 | MLUE | Eocene Mudstone/Limestone Unit | GE |
| 34.00 | BRNF | Bournemouth Formation | GN | WSXB |
| 35.00 | HEAB | Headon Beds | GB |
| 36.00 | BTSD | Barton Sand |
| 37.00 | BTCL | Barton Clay |
| 38.00 | BRAG | Bracklesham Formation | GY | GA |
| 39.00 | BRME | Bracklesham Equivalent | GI | GJ | SWAP |
| 40.00 | BGB | Bagshot Beds | GE | WSXB |
| 41.00 | BAGS | Bagshot Sands | GZ |
| 42.00 | BAGC | Bagshot Clay |
| 43.00 | BECS | Becton Sand | GB |
| 44.00 | BECB | Becton Bunny |
| 45.00 | CHAM | Chama Sand |
| 46.00 | LYND | Lyndhurst Beds |
| 47.00 | WALT | Walton Beds | GZ |
| 48.00 | HBML | Hamstead Bembridge Marls | GB |
| 49.00 | BEML | Bembridge Limestone |
| 50.00 | OSB | Osborne Beds |
| 51.00 | BAGE | Bagshot Equivalent | GI | GB | SWAP |
| 52.00 | LCLF | London Clay Formation | GC | GY | WSXB |
| 53.00 | LCFD | London Clay Fm Division D | GN |
| 54.00 | LCFC | London Clay Fm Division C |
| 55.00 | LCFB | London Clay Fm Division B |
| 56.00 | LCFA | London Clay Fm Division A |
| 57.00 | LCLE | London Clay Equivalent | GI | SWAP |
| 58.00 | POOL | Poole Formation | GZ | WSXB |
| 59.00 | PSMS | Portsmouth Sand | GN |
| 60.00 | REDF | Reading Formation | GP |
| Page 1 of 60 | 07/07/2004 |