The BGS Lexicon of Named Rock Units — Result Details

Lincolnshire Limestone Formation

Computer Code: LL Preferred Map Code: LL
Status Code: Full
Age range: Bajocian Age (JB) — Bajocian Age (JB)
Lithological Description: Limestone, typically calcilutites, and peloidal wackestones and packstones in the lower part (Lower Lincolnshire Limestone) and high energy ooidal and shell fragmental grainstones in the upper part (Upper Lincolnshire Limestone). Commonly includes sandy limestone in basal part and may contain substantial units of mudstone particularly from the Lincoln area northwards.
Definition of Lower Boundary: Quasi-conformable or more or less disconformable contact between sandstones and mudstones of the underlying Grantham Formation or, where the latter is absent (mainly in the north), ferruginous sandstone of Northampton Sand Formation, or mudstone of Lias Group, overlain by limestone of the Lincolnshire Limestone.
Definition of Upper Boundary: Disconformable, commonly markedly eroded and karstified top surface of limestone, overlain by non-calcareous, non-marine sandstones, siltstones and mudstones of the overlying Rutland Formation. Near its northern limit only, disconformable contact between limestone and ferruginous sandy calcareous sediments of the Hunstanton Formation above (Cretaceous).
Thickness: 0-30 m (south Lincolneshire) or more (see Ashton, 1980).
Geographical Limits: Market Weighton area (where overstepped by Cretaceous, Chalk Group, Hunstanton Formation) to the Kettering-Peterbogough area, where overstepped by the Rutland Formation. In subcrop, restricted essentially to onshore areas of the northern part of the East Midlands Shelf. Offshore passes eastwards into non-carbonate correlatives.
Parent Unit: Inferior Oolite Group (INO)
Previous Name(s): Lincolnshire Limestone [Obsolete Name and Code: Use LL] (-2904)
Alternative Name(s): none recorded or not applicable
Type Area  South Lincolnshire, Leicestershire and Rutland (Grantham to Stamford area) [Note: Grid References define Grantham to Stamford.] 
Reference Section  Ketton Quarry, 1.5km north of Ketton, Rutland, near Stamford, Lincolnshire. Fully exposed: up to 17.3 m of beds. (Hudson and Clements, 2007, 245-249). 
Partial Type Section  Copper Hill Quarry, Ancaster. Upper Lincolnshire Limestone, part of the Lower Lincolnshire Limestone. (Sumbler and others, 1990). 
Partial Type Section  Leadenham Quarry (part of the Upper Lincolnshire Limestone and most of the Lower Lincolnshire Limestone, including base) (Sumbler and others, 1990). 
Partial Type Section  Metheringham Quarry. Showing Ashton's Metheringham and Blankney members, middle or upper part of the Lower Lincolnshire Limestone; Ashton, 1980. 
Waters, C N, Smith, K, Hopson, P M, Wilson, D, Bridge, D M, Carney, J N, Cooper, A H, Crofts, R G, Ellison, R A, Mathers, S J, Moorlock, B S P, Scrivener, R C, McMillan, A A, Ambrose, K, Barclay, W J, and Barron, A J M. 2007. Stratigraphical Chart of the United Kingdom: Southern Britain. British Geological Survey, 1 poster. 
Ashton, M 1980. The stratigraphy of the Lincolnshire Limestone Formation (Bajocian) in Lincolnshire and Rutland (Leicestershire). Proceedings of the Geologists' Association, Vol.91, 203-224. 
Hudson, J D and Clements, R G. 2007. The Middle Jurassic Succession at Ketton, Rutland. Proceedings of the Geologists' Association, Vol 118, 239-264. 
Judd, J W. 1875. The geology of Rutland and parts of Lincoln, Leicester, Northampton, Huntingdon and Cambridge. Memoir of the Geological Survey of Great Britain (Old Series sheet 64). 
Cox, B M, and Sumbler, M G. 2002. British Middle Jurassic Stratigraphy. Geological Conservation Review Series No.26. [Peterborough: Joint Nature Conservation Committee.] 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E102 E103 E114 E115 E127 E128 E142 E144 E171 E185 E072 E080 E089