| Order | Type | Group | Form-ati | Member | Description | Upper | Lower | Basin |
| By No. | on | Age | Age |
| 1921.0 | SED | BRNT | BERY | LBS1 | Lower Beryl Sandstone Unit 1 | J | SVIG |
| 1922.0 | LBS2 | Lower Beryl Sandstone Unit 2 |
| 1923.0 | MDBY | Middle Beryl Shale | NONS |
| 1924.0 | LBES | Lower Beryl Shale |
| 1925.0 | COAL | Mid Jurassic Coaly Unit | JN | JC |
| 1926.0 | BERB | Beryl B Sands | JM |
| 1927.0 | BERC | Beryl C Sands |
| 1928.0 | BRCS | Bruce C Sand | JA | JB |
| 1929.0 | 22V6 | J22V6 Unit | JB |
| 1930.0 | 22V5 | J22V5 Unit |
| 1931.0 | BRBS | Bruce B Sand |
| 1932.0 | J27 | J27 Unit |
| 1933.0 | J26B | J26B Unit |
| 1934.0 | J26A | J26A Unit |
| 1935.0 | J25B | J25B Unit |
| 1936.0 | BCCL | B/C Coal |
| 1937.0 | BER3 | Beryl Unit III | JU |
| 1938.0 | BER2 | Beryl Unit II |
| 1939.0 | BER1 | Beryl Unit I |
| 1940.0 | BE1B | Beryl Ib | JN |
| 1941.0 | BE1A | Beryl Ia | JB |
| 1942.0 | TARB | Tarbert |
| 1943.0 | TMDS | Tarbert Mid Shale | JM |
| 1944.0 | TBSH | Terbert Basal Sand |
| 1945.0 | TAR3 | Tarbert 3 Member |
| 1946.0 | TAR2 | Tarbert 2 Member |
| 1947.0 | TAR1 | Tarbert 1 Member |
| 1948.0 | TUSD | Upper Sands | JN | JC |
| 1949.0 | TUBS | Upper Bruce Stn |
| 1950.0 | TASD | ASD A Sand Mbr | JB | JN |
| 1951.0 | TBSD | BSD B Sand Mbr |
| 1952.0 | TARC | Tarbert C | JM |
| 1953.0 | NESS | Ness | JB |
| 1954.0 | NES2 | Ness 2 Member | JM |
| 1955.0 | NES1 | Ness 1 Member |
| 1956.0 | ACOL | A Coal | J |
| 1957.0 | CCOL | C Coal |
| 1958.0 | NESB | Ness B Formation | JM | EMSH |
| 1959.0 | NESA | Ness A Formation |
| 1960.0 | NCAU | Coaly Unit | JT | JB | NONS |
| 1961.0 | NCSD | CSD C Sands | JB |
| 1962.0 | NEC2 | Ness C2 Sand | JN | JB |
| 1963.0 | NC1B | Ness C1(B) Sand |
| 1964.0 | NIBD | Ness Interbedded Unit | JB |
| 1965.0 | NUCS | Upper Coal Series | JM | ESHB |
| 1966.0 | NPS | Persistent Shale Marker |
| 1967.0 | NLCS | Lower Coal Series |
| 1968.0 | MESS | Marine Ness Unit |
| 1969.0 | UNES | Upper Ness Member | JB |
| 1970.0 | UNEH | Upper Ness H | JM |
| 1971.0 | UNEJ | Upper Ness J |
| 1972.0 | UNEK | Upper Ness K |
| 1973.0 | UNEL | Upper Ness L |
| 1974.0 | UNEM | Upper Ness M |
| 1975.0 | MNES | Middle Ness | JB |
| 1976.0 | MNSS | Mid Ness Shale |
| 1977.0 | LNES | Lower Ness Member |
| 1978.0 | ETIV | Etive | NONS |
| 1979.0 | ETI3 | Etive Zone 3 | JM |
| 1980.0 | ETI4 | Etive Zone 4 |
| 1981.0 | RANN | Rannoch | JA |
| 1982.0 | URAN | Upper Rannoch |
| 1983.0 | MRAN | Middle Rannoch | JM | ESHB |
| Page 32 of 60 | 07/07/2004 |