The BGS Lexicon of Named Rock Units — Result Details
Rugby Member
| Computer Code: | RLS | Preferred Map Code: | RLs |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Hettangian Age (JH) — Sinemurian Age (JS) | ||
| Lithological Description: | Alternating grey, argillaceous limestones and mudstones. | ||
| Definition of Lower Boundary: | Conformable on Saltford Shale Member - placed at base of an argillaceous limestone above which such limestones are common; at type section boundary placed at limestone below Bed 8 of Clements (1977). | ||
| Definition of Upper Boundary: | Placed at top of highest limestone of the limestone/mudstone sequence. At the type section, placed at Bed 53c of Clements (1977). | ||
| Thickness: | 36m at type section; up to 40m elsewhere. | ||
| Geographical Limits: | Central and southern Midlands. | ||
| Parent Unit: | Blue Lias Formation (BLI) | ||
| Previous Name(s): | Lima Beds [Obsolete Name and Code: Use RLS]
(-4865)
Plagiostoma Beds [Obsolete Name and Code: Use RLS] (-4866) Blue Lias [Obsolete Code: Use BLI] (BLS) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Reference Section | Harbury Quarry section and borehole (Brewster, 1978; Old et al, 1987). | ||
| Type Section | Rugby Portland Cement Company's Parkfield Road Quarry, Rugby (Clements, 1977). | ||
| Reference Section | Long Itchington Quarry (Clements, 1975). | ||
| Reference(s): | |||
| Donovan, D T. 1956. The zonal stratigraphy of the Blue Lias around Keynsham, Somerset. Proceedings of the Geologists' Association, Vol. 66, 182-212. | |||
| Clements, R G (editor). 1977. Report on the geology of Parkfield Road Quarry, Rugby. Department of Geology, Leicester University, p.54. | |||
| Old, R A, Sumbler, M G and Ambrose, K, 1987. Geology of the country around Warwick. Memoir of the British Geological Survey, Sheet 184 (England and Wales). | |||
| Brewster, J. 1978. Harbury Quarry Borehole. Report of the Institute of Geological Sciences, No. 77/10. | |||
| Clements, R G (editor). 1975. Report on the geology of Long Itchington Quarry, Leicester. Department of Geology, Leicester University. | |||
| Old R A, Hamblin, R J O, Ambrose, K, and Warrington G. 1991. Geology of the country around Redditch. Memoir of the British Geological Survey, Sheet 183 (England and Wales). | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E183 E169 E199 E264 | |||