| Order | Type | Group | Form-ati | Member | Description | Upper | Lower | Basin |
| By No. | on | Age | Age |
| 3498.0 | SED | LLGE | Lower Limestone Equivalent | CX | SONS |
| 3499.0 | LLG | Lower Limestone Group | CV | CN | MID |
| 3500.0 | MIKI | Middle Kinning Limestone |
| 3501.0 | FOHO | Foul Hosie Limestone |
| 3502.0 | CNMA | Charlestown Main Limestone |
| 3503.0 | CNGR | Charlestown Green Limestone |
| 3504.0 | CHSL | Charlestown Station Limestone |
| 3505.0 | HUR | Hurlet Limestone |
| 3506.0 | RSH | Raeburn Shale | CU |
| 3507.0 | BARL | Barracks Limestone | CV |
| 3508.0 | LG3L | 3RD Limestone | CL |
| 3509.0 | LG2L | 2nd Limestone |
| 3510.0 | NOGL | North Greens Limestone |
| 3511.0 | GILS | Gilmerton Limestone |
| 3512.0 | AL2 | Second Abden Limestone |
| 3513.0 | BIBU | Bilston Burn Limestone |
| 3514.0 | LVEX | Lower Vexhim Limestone |
| 3515.0 | UVEX | Upper Vexhim Limestone |
| 3516.0 | LG1L | No. 1 Limestone |
| 3517.0 | PDL | Pendleside Limestone Group | CR | EMSH |
| 3518.0 | INV | Inverclyde Group | CL | MID |
| 3519.0 | SYG | Strathclyde Group |
| 3520.0 | LCCG | Lower Carboniferous Clastic Grp. | SPEN MOFI NPEN |
| 3521.0 | MSHC | Massive Shale Unit | INMF |
| 3522.0 | CINT | Interbedded Unit |
| 3523.0 | LIMG | Limburg Group | CU | SONS |
| 3524.0 | CLMS | Carboniferous Limestone | CL | SOLW IRSEB MANX |
| 3525.0 | YORF | Yoredale Formation | CG | AS | SONS |
| 3526.0 | GTLM | Great Limestone Marker | CX |
| 3527.0 | YRLL | Lower Limestone Unit | AS |
| 3528.0 | BRIG | Brigantian Sandstone Unit | CX |
| 3529.0 | TDST | Top Dinantian Sandstone | CL | EMSH |
| 3530.0 | LCFS | Lower Cefn-Y-Fedw Sandstone | CV | SPE |
| 3531.0 | ONMR | Onecote Member |
| 3532.0 | ONS | Onecote Sandstone |
| 3533.0 | CTSH | Cherty Shale | WELM SPEN |
| 3534.0 | TLF | Trefor Limestone | CL | WEL |
| 3535.0 | ELF | Eglwyseg Limestone |
| 3536.0 | CLLM | Chalky Limestone Member | SPEN EMSH |
| 3537.0 | D5 | D5 | EMSH |
| 3538.0 | LOBS | Lower Bowland Shale | CR | CX | SPE |
| 3539.0 | CJSM | Arundian Shale Marker | CJ | EMSH |
| 3540.0 | DLMC | Dolomite Member C | CI | SPE |
| 3541.0 | DLMB | Dolomite Member B |
| 3542.0 | DLMA | Dolomite Member A |
| 3543.0 | BDSM | Black Dolomite/Siltstone Member | CF |
| 3544.0 | LRLS | Lower Limestone Shale Fm | CT | WSXB WELM |
| 3545.0 | UMDD | Upper Mudstone Division |
| 3546.0 | LLMD | Lower Limestone Division |
| 3547.0 | CREF | Cannington Reef Limestone Equiv | WEL |
| 3548.0 | BLAK | Black Rock Limestone Fm Equiv |
| 3549.0 | BLKD | Black Rock Dolomite Fm Equiv |
| 3550.0 | EXIG | Extrusive Igneous Member | CF | EMSH |
| 3551.0 | DTF | Dinantian Tuffaceous Member | CL | SPE |
| 3552.0 | LMSH | Limestone Shales |
| 3553.0 | DTOD | Derbyshire Toadstone |
| 3554.0 | ASTL | Ashover Tuffs and Limestones |
| 3555.0 | ANHS | Anhydrite Series |
| 3556.0 | YORQ | Yoredale Group Equivalent | CE | CJ | SONS |
| 3557.0 | CVOL | Volcanic Group | C | MIDV |
| 3558.0 | PILT | Pilton Beds | CT | CARD |
| 3559.0 | SCEM | Scremerston Coal Group | AS | SONS |
| 3560.0 | SCEF | Scremerston Formation | CX |
| Page 57 of 60 | 07/07/2004 |