| Order | Type | Group | Form-ati | Member | Description | Upper | Lower | Basin |
| By No. | on | Age | Age |
| 1984.0 | SED | BRNT | RANN | LRAN | Lower Rannoch | JA | NONS |
| 1985.0 | RANA | Rannoch A/A2 | JM | ESHB |
| 1986.0 | RANB | Rannoch B |
| 1987.0 | RANC | Rannoch C |
| 1988.0 | RAND | Rannoch D |
| 1989.0 | RANJ | Rannoch J |
| 1990.0 | RANS | Rannoch Shale Member | NONS |
| 1991.0 | RASS | Rannoch Sandstone |
| 1992.0 | RAN5 | Rannoch Zone 5 |
| 1993.0 | RAN6 | Rannoch Zone 6 |
| 1994.0 | BROM | Broom | JA |
| 1995.0 | MBER | Middle Beryl Sandstone | JN |
| 1996.0 | LI | Lias | JL | SONS |
| 1997.0 | OFFA | Offa Formation | JE |
| 1998.0 | PEND | Penda Formation | JH | JE |
| 1999.0 | LIAC | Lias Clay Formation | JL | CNSB |
| 2000.0 | LISE | Liassic Shale Equivalent | CARD |
| 2001.0 | LIME | Liassic Marl Equivalent |
| 2002.0 | LILE | Liassic Limestone Equivalent | JH |
| 2003.0 | BLCE | Basal Liassic Claystone equivalent |
| 2004.0 | PABB | Pabba Shale Formation | JS | JE | NMH |
| 2005.0 | BROD | Broadford Beds |
| 2006.0 | AALS | Aalenian Sandstone | JA | CARD |
| 2007.0 | DGGR | Dogger | JL | SONS |
| 2008.0 | LISS | Lias Sandstone | SVIG |
| 2009.0 | LISH | Lias Shale |
| 2010.0 | LSHL | Limestone and Shales | JS | JA | STCR COCB COHI |
| 2011.0 | INLI | Infra Liassic | JL | SONS |
| 2012.0 | CLM | Coleby Mudstone Formation | JS | JA | EMSH |
| 2013.0 | SMD | Scunthorpe Mudstone Formation | JH | JS |
| 2014.0 | ULI | Upper Lias | JT | CARD |
| 2015.0 | PPRH | Paper Shales | CECH |
| 2016.0 | BDS | Bridport Sands | JA | ANPA |
| 2017.0 | BDSE | Bridport Sands Equivalent | JT | JB | WSXB |
| 2018.0 | DWNE | Downcliff Equivalent | CECH |
| 2019.0 | DCC | Downcliff Grit | JL | WSXB |
| 2020.0 | DCCY | Downcliff Clay | JA | JT | CECH |
| 2021.0 | YEOV | Yeovil Sands | JT | WSXB |
| 2022.0 | MIDF | Midford Sand | JB |
| 2023.0 | MIDE | Midford Sand Equivalent |
| 2024.0 | ULIS | Upper Lias Sands | JL |
| 2025.0 | ULC | Upper Lias Clay | JT | ANPA |
| 2026.0 | ULCS | Upper Lias Clays and Siltstones | JL | WLDB |
| 2027.0 | WHMF | Whitby Mudstone Formation | JT | JE | SONS |
| 2028.0 | SHSF | Staithes Sandstone Formation |
| 2029.0 | RDCM | Redcar Mudstone Formation | JL |
| 2030.0 | MULI | Middle - Upper Lias | JE | JT | WSXB |
| 2031.0 | MULS | Middle - Upper Lias Silts |
| 2032.0 | MLLI | Middle and Lower Lias | JH | JE | WCHB ANPA CARD |
| 2033.0 | MLI | Middle Lias | JL | WLDB |
| 2034.0 | JBED | Junction Bed | JT | WCHB CARD |
| 2035.0 | JRML | Junction Rock Marlstones | JE | WSXB |
| 2036.0 | MRSB | Marlstone Sandstone Rock | EMSH |
| 2037.0 | MLST | Marlstone Equivalent | JT | SONS |
| 2038.0 | MRB | Marlstone Rock Bed | JL | WSXB |
| 2039.0 | MRBE | Marlstone Rock Bed Equivalent | JT | JB |
| 2040.0 | TCEQ | Thorncombe Equivalent | CECH |
| 2041.0 | TCSD | Thorncombe Sands | JL | DORS |
| 2042.0 | LBDS | Laminated Beds | JE |
| 2043.0 | MBDS | Micaceous Beds |
| 2044.0 | MARS | Margaritatus Stone Band | JL |
| 2045.0 | DCS | Downcliff Sands |
| 2046.0 | PENS | Pennard Sands | JE | WSXB |
| Page 33 of 60 | 07/07/2004 |