| Order | Type | Group | Form-ati | Member | Description | Upper | Lower | Basin |
| By No. | on | Age | Age |
| 243.00 | SED | HORD | ALBA | BRIO | Brioc Member | GN | CNSB |
| 244.00 | ALBE | Alba Sands Equivalent | GL | SVIG |
| 245.00 | ALE1 | Alba Equivalent 1 | GE |
| 246.00 | ALE2 | Alba Equivalent 2 |
| 247.00 | LLRK | Lower Lark Formation | GO | MOFI |
| 248.00 | ULRK | Upper Lark Formation | NC | NA |
| 249.00 | TAYF | Tay Formation | GL | GA | CNSB |
| 250.00 | TYSD | Tay Sands | GE |
| 251.00 | TYSH | Tay Shales |
| 252.00 | UTS | Upper Tay Sands |
| 253.00 | UTSU | Upper Tay Shale Unit |
| 254.00 | MTSU | Middle Tay Sand Unit |
| 255.00 | LTSS | Lower Tay Sands | GN |
| 256.00 | TYEQ | Tay Equivalent | GL |
| 257.00 | FRGG | Frigg Formation | GA | NONS |
| 257.50 | UFRI | Upper Frigg Injectite Complex | GE |
| 258.00 | FRG3 | Frigg III | GL | ROCK |
| 259.00 | FRG2 |
| 260.00 | FRGH | Frigg Shale Member | GY | NONS |
| 261.00 | FR1A | Frigg Sandstone Member (PE1A) |
| 262.00 | FR1B | Frigg Sandstone Member (PE1B) |
| 263.00 | LSDM | Lower Sand Member | GE |
| 264.00 | LCYM | Lower Clay Member |
| 265.00 | MSDM | Middle Sand Member |
| 266.00 | UCYM | Upper Clay Member |
| 267.00 | BRGG | Base Frigg Formation | GY | GL | SVIG |
| 268.00 | UPFR | Upper Frigg Formation | NONS |
| 269.00 | LWFR | Lower Frigg Formation |
| 270.00 | UPFG | Upper Frigg Formation |
| 271.00 | FRSM | Frigg Sand Member | GE |
| 272.00 | UFRQ | Upper Frigg Formation Equivalent | GY |
| 273.00 | FRMQ | Frigg Member Equivalent | SVIG |
| 274.00 | FRGS | Frigg Sequence | GE | CNSB |
| 275.00 | EESB | Early Eocene Sand Unit B | GY | NONS |
| 276.00 | LECM | Lower Eocene Claystone Member | GE |
| 277.00 | EEUS | Early Eocene Upper Sand Unit |
| 278.00 | LOTH | Lothian Formation | SVIG |
| 279.00 | CARA | Caran Member | CNSB |
| 280.00 | EOSU | Siltstone Unit | NONS |
| 281.00 | FRGE | Frigg Sandstone Equivalent |
| 282.00 | UCLB | Undifferentiated Clays & Basalts | GN | NOCH |
| 283.00 | NSGQ | North Sea Group Equivalent | GC | NU | NONS |
| 284.00 | NOSG | North Sea Group | GN | SONS |
| 285.00 | UNSG | Upper North Sea Group | NM | Q |
| 286.00 | MNSG | Middle North Sea Group | GO |
| 287.00 | LNSG | Lower North Sea Group | GP | GE |
| 288.00 | RUPF | Rupel Formation | GO |
| 289.00 | BOOM | Boom Clay |
| 290.00 | DONG | Dongen Formation | GE |
| 291.00 | DNGC | Dongen Clay |
| 292.00 | BDTT | Basal Dongen Tuffite |
| 293.00 | LAND | Landen Formation | GP |
| 294.00 | LANC | Landen Clay |
| 295.00 | NSMF | North Sea Marl Formation | GC | MOFI |
| 296.00 | NSCY | North Sea Clay Formation | GN | QP | CNSB |
| 297.00 | UCGC | Upper Central Graben Clay Member | GY |
| 298.00 | HUCF | Hutton Clay Formation | GE | SVIG |
| 299.00 | HUSF | Hutton Sand Formation |
| 300.00 | FNSS | Fladen Sand Formation | GN |
| 301.00 | ASHM | Ash Marker | GY | SONS |
| 302.00 | LAMT | Laminated Tuffaceous Clay Unit | GP | GE |
| 303.00 | FASH | Faeroe-Shetland Channel Group | GE | WESH |
| 304.00 | FSVF | Faeroe-Shetland Volcanics | KU | GY | ROCK FSHT |
| Page 5 of 60 | 07/07/2004 |