The BGS Lexicon of Named Rock Units — Result Details

Kirton Cementstone Beds

Computer Code: KCM Preferred Map Code: notEntered
Status Code: Index Level
Age range: Bajocian Age (JB) — Bajocian Age (JB)
Lithological Description: Silicate- and calcareous mudstone, interbedded with thin and more or less argillaceous limestones (calcilutite and shelly and peloidal wackestone). Locally includes coralliferous limestone bodies (knoll reef).
Definition of Lower Boundary: Conformable contact between the underlying less argillaceous limestone (peloidal or ooidal wackestones and packstones - Santon Oolite) and calcareous siltstone (Raventhorpe Beds) succession, generally lacking mudstone interbeds, overlain by interbedded calcareous mudstone and argillaceous limestone of the Kirton Cementstone Beds.
Definition of Upper Boundary: Disconformable, commonly channelled contact between interbedded calcareous mudstone and argillaceous limestone of the Kirton Cementstone and high energy ooidal limestones of the overlying Upper Lincolnshire Limestone Member [Hibaldstow Limestone/Cave Oolite]. Near its northern limit only, disconformable contact with ferruginous sandy calcareous sediments of the Hunstanton Formation (Cretaceous).
Thickness: 0 to c.9.5m
Geographical Limits: BGS 1:50 000 sheets 72, 80, 89, 102 and possibly 114. Lincoln area to Market Weighton.
Parent Unit: Lower Lincolnshire Limestone Member (LLL)
Previous Name(s): Kirton Beds (Part) (-988)
Kirton Cementstones Member (-2872)
Kirton Cementstones And Kirton [Cement] Shale (-989)
Kirton Cementstones (-339)
Kirton Cementstones Member Plus Kirton Shale Member (-3491)
Kirkton Cementstones Member Plus Kirton Cement Shale (-4114)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Reference Section  Manton Stone Quarry, 3.8km north of Kirton in Lindsey, North Lincolnshire. Lower 5.6m of beds exposed, (including Scawby Limestone). Ashton, 1975; Cox and Sumbler, 2002, p.302 
Type Area  Kirton in Lindsey, North Lincolnshire. 
Reference(s):
Ashton, M. 1975. A new section in the Lincolnshire Limestone of South Humberside and its significance. Proceedings of the Yorkshire Geological Society, Vol.40, 419-429. 
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. 
Cox, B M and Sumbler, M G. 2002. British Middle Jurassic Stratigraphy. Geological Conservation Review Series No.26. [Peterborough: Joint Nature Conservation Committee.] 
Kent, P E. 1966. A review of the correlation of the Lincolnshire Limestone (Inferior Oolite). Transactions of the Leicester Literary and Philosophical Society, Vol.60, 57-69. 
Ussher W A E, Fox-Strangways, C, Cameron, A C G, Reid, C and Jukes-Browne, A J. 1890. The Geology of parts of Lincolnshire and South Yorkshire. Memoir of the Geological Survey of Great Britain, Old series Sheet 86. (England and Wales). 
Gaunt, G D, Fletcher, T P and Wood, C J. 1992. Geology of the country around Kingston upon Hull and Brigg. Memoir of the British Geological Survey, sheets 80 and 89 (England and Wales). 172pp. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E072 E080 E089