| Order | Type | Group | Form-ati | Member | Description | Upper | Lower | Basin |
| By No. | on | Age | Age |
| 1606.0 | SED | HUMB | BARG | ABSD | ABSD A and B Sands | JC | HAPL EORB GRSP |
| 1607.0 | BAAE | Brora Argillaceous Fmn Equivalent | JO | SVIG |
| 1608.0 | DOGL | Dogger Limestone | JM |
| 1609.0 | PORT | Portland | JP | CARD ANPA |
| 1610.0 | PLS | Portland Sandstone | WLDB |
| 1611.0 | PLLM | Portland Limestone |
| 1612.0 | CORL | Corallian Lsts Sst and Msts | JO | WSXB |
| 1613.0 | COR | Corallian | SONS ANPA |
| 1614.0 | TRCB | Trigonia Clavellata Beds | JU | WSXB |
| 1615.0 | OSS | Osmington Oolite |
| 1616.0 | BFG | Bencliff Grit |
| 1617.0 | NGAC | Nothe Grit and Clay |
| 1618.0 | NOG | Nothe Grit |
| 1619.0 | NOC | Nothe Clay |
| 1620.0 | AMC | Ampthill Clay | JO | WLDB |
| 1621.0 | AMCE | Ampthill Clay Equivalent | WSXB |
| 1622.0 | WWB | West Walton Beds | EMSH |
| 1623.0 | UCR | Upper Corallian | WLDB |
| 1624.0 | LCR | Lower Corallian |
| 1625.0 | CRLB | Basal Corallian Limestone | JC |
| 1626.0 | CRLM | Corallian Limestone | JO | KC |
| 1627.0 | CROO | Coralline Oolite | JD | CLEV |
| 1628.0 | CRSD | Coralline Sandstone Unit | JU | WLDB |
| 1629.0 | CORA | Corallian Argillaceous Unit |
| 1630.0 | OXC | Oxford Clay | JC | JO | SONS ANPA CARD |
| 1631.0 | UOXC | Upper Oxford Clay | JU | WSXB |
| 1632.0 | MOXC | Middle Oxford Clay |
| 1633.0 | LOXC | Lower Oxfordian Clays | JC | JO |
| 1634.0 | RHAX | Rhaxella Sand | JO | HAPL EORB GRSP |
| 1635.0 | LCGT | Lower Calcareous Grit Formation | SONS |
| 1636.0 | OXSD | Oxford Sands | CARD |
| 1637.0 | SEEY | Seeley Formation | JU | JM | SONS |
| 1638.0 | KLB | Kellaways Beds | JC | ANPA |
| 1639.0 | KLS | Kellaways Sand | WLDB CECH |
| 1640.0 | KLR | Kellaways Rock |
| 1641.0 | KLC | Kellaways Clay |
| 1642.0 | GOG | Great Oolite Group | JN | WLDB |
| 1643.0 | CB | Cornbrash | JC | ANPA |
| 1644.0 | UCB | Upper Cornbrash | DORS |
| 1645.0 | LCB | Lower Cornbrash |
| 1646.0 | OSGF | Osgodby Formation | JM | SONS |
| 1647.0 | SCAY | Scalby Formation |
| 1648.0 | SCGH | Scarborough Formation |
| 1649.0 | CLGH | Cloughton Formation |
| 1650.0 | FMB | Forest Marble | JN | ANPA |
| 1651.0 | DIGB | Digonia Bed | WSXB |
| 1652.0 | URGS | Upper Rags Equivalent |
| 1653.0 | BOUI | Boueti Bed |
| 1654.0 | BAOO | Bath Oolite |
| 1655.0 | TWIN | Twinhoe Beds |
| 1656.0 | CDOO | Combe Down Oolite |
| 1657.0 | WHIL | White Limestone |
| 1658.0 | BLAM | Bladon Member |
| 1659.0 | ARM | Ardley Member |
| 1660.0 | SHIM | Shipton Member |
| 1661.0 | HAMM | Hampen Marly Formation |
| 1662.0 | TAYL | Taynton Limestone |
| 1663.0 | SHMF | Sharps Hill Formation |
| 1664.0 | SHMM | Sharps Hill Member |
| 1665.0 | SFSF | Stonesfield Slate Member |
| 1666.0 | CNMF | Chipping Norton Formation |
| 1667.0 | CNMM | Chipping Norton Member |
| 1668.0 | SWEM | Swerford Member |
| Page 27 of 60 | 07/07/2004 |