| Order | Type | Group | Form-ati | Member | Description | Upper | Lower | Basin |
| By No. | on | Age | Age |
| 3304.0 | SED | CONY | SCHO | LKEM | Lower Ketch Member | CU | SONS |
| 3305.0 | LKE3 | Lower Kecth 3 Member | CP |
| 3306.0 | LKE2 | Lower Ketch 2 Member |
| 3307.0 | LKE1 | Lower Ketch 1 Member |
| 3308.0 | SCHL | Lower Schooner Member |
| 3309.0 | CAIS | Caister Coal Formation | CW |
| 3310.0 | CASS | Caister Sandstone Unit | CB |
| 3311.0 | WIGS | Westphalian Igneous Series | C | EMSH |
| 3312.0 | KSIL | Kilburn Sill |
| 3313.0 | WSEQ | Whin Sill Equivalent | CW | SONS |
| 3314.0 | MCMS | Middle Coal Measures (Scotland) | MID |
| 3315.0 | LCMS | Lower Coal Measures (Scotland) |
| 3321.0 | MGE | Millstone Grit Equivalent | BN | RC | SONS |
| 3322.0 | MG | Millstone Grit | CN | SOLW IRSEB MANX |
| 3323.0 | HAFE | Haslingden Flags Equivalent | RC | IRSE |
| 3324.0 | HBGE | Holcombe Brook Grit Equivalent |
| 3325.0 | MGIT | Middle Grits | CZ | CY | WID |
| 3326.0 | MG1A | Middle Grit 1A | SPE |
| 3327.0 | MG2A | Middle Grit 2A |
| 3328.0 | MG2B | Middle Grit 2B |
| 3329.0 | MG2C | Middle Grit 2C |
| 3330.0 | LGIT | Lower Grits | CK | CZ | WID |
| 3331.0 | LG1 | Lower Grit 1 | CZ | CY | SPE |
| 3332.0 | LG2A | Lower Grit 2A |
| 3333.0 | LG2B | Lower Grit 2B |
| 3334.0 | LG3 | Lower Grit 3 |
| 3335.0 | FARW | Farewell Rock | CN | WEL |
| 3336.0 | AQG | Aqueduct Grit |
| 3337.0 | AQMB | Aqueduct Marine Band |
| 3338.0 | DBS | Dee Bridge Sandstone |
| 3339.0 | MCFS | Middle Cefn-Y-Fedw Sandstone |
| 3340.0 | ASFE | Aqueduct Sandstone Fm.Equivalent | CY | CA | SPEN IRSE |
| 3341.0 | UGWE | Upper Gwespyr Sandstone Fm.Equiv |
| 3342.0 | LGWE | Lower Gwespyr Sandstone Fm.Equiv |
| 3343.0 | CGFE | Chatsworth Grit Formation Equiv. |
| 3344.0 | RGFE | Roches Grit Formation Equivalent |
| 3345.0 | CEFN | Cefn-y-Fedw Sandstone Fm.Equiv. |
| 3346.0 | HSH | Hollywell Shales | CE | CY | CHE |
| 3347.0 | CFS | Cefn-Y-Fedw Sandstone | CX | CG |
| 3348.0 | SSCN | Sandy Unit | CN | INMF |
| 3349.0 | SSTA | Sandstone A | EMSH |
| 3350.0 | SSTB | Sandstone B |
| 3351.0 | SSTC | Sandstone C | SPE |
| 3352.0 | LKSH | Lask Edge Shales |
| 3353.0 | RGMB | Reticuloceras Gracile Marine Bed | CZ | SPEN NPEN SONS |
| 3354.0 | RSMB | Reticuloceras Superbilingue M.B. | SPEN NPEN SONS |
| 3355.0 | RRMB | Reticuloceras Reticulatum Mar.Bd | CK |
| 3356.0 | GCMB | Gastrioceras Cumbriense Mar.Bd. | CY |
| 3357.0 | BGSD | Brigg Sandstone | EMSH |
| 3358.0 | BREG | Brown Edge Grits |
| 3359.0 | GLMB | Gastrioceras Cancellatum Mar.Bd. | SPEN NPEN SONS |
| 3360.0 | CMB | Colsterdale Marine Beds | CN | EMSH |
| 3361.0 | UBS | Upper Bowland Shale | CE | WLA |
| 3362.0 | BOSH | Bowland Shales | EMSH |
| 3363.0 | BSHE | Bowland Shale Group Equivalent | CX | CG | SONS |
| 3364.0 | SDSH | Sabden Shales | CG | CK | WLA |
| 3365.0 | LSSH | Lower Sabden Shales | CLEV |
| 3366.0 | ESH | Edale Shales | CE | CK | SPE |
| 3367.0 | GAES | Gamma Active Edale Shales |
| 3368.0 | DUFT | Duffield Turbidites | CO |
| 3369.0 | WPG | Wiltshire Grit |
| 3370.0 | SKGG | Skipton Moor Grit |
| 3371.0 | SKGE | Skipton Moor Grit Equivalent | SONS |
| Page 54 of 60 | 07/07/2004 |