The BGS Lexicon of Named Rock Units — Result Details

Raventhorpe Beds

Computer Code: RVB Preferred Map Code: notEntered
Status Code: Index Level
Age range: Bajocian Age (JB) — Bajocian Age (JB)
Lithological Description: Limestone, predominantly calcilutitic and more or less argillaceous, interbedded with calcareous mudstone and calcareous siltstone.
Definition of Lower Boundary: Quasi-conformable or more or less disconformable contact between sandstone and mudstone of the underlying Grantham Formation or, where the latter is absent, ferruginous sandstone of the Northampton Sand Formation, or mudstone of Lias Group and the overlying interbedded limestone, calcareous mudstone and calcareous siltstone of the Raventhorpe Beds.
Definition of Upper Boundary: Conformable contact between interbedded limestone, calcareous mudstone and calcareous siltstone of the Raventhorpe Beds and the mudstone-rich succession of the overlying Kirton Cementstone Beds or with peloidal and ooidal limestone of the Santon Oolite (where present).
Thickness: Up to c.8m
Geographical Limits: BGS 1:50 000 sheets 72, 80, 89, and possibly 102; North Lincolnshire to Market Weighton.
Parent Unit: Lower Lincolnshire Limestone Member (LLL)
Previous Name(s): Basal Hydraulic Limestone Member (-142)
Raventhorpe Beds Member (-4868)
Raventhorpe Member Plus Santon Oolite Member (Part) (-2405)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Area  Raventhorpe (deserted mediaeval village) near Scunthorpe, North Lincolnshire. 
Reference Section  Manton Stone Quarry, 4km west of Hibaldstow, North Lincolnshire. Formerly fully exposed: about 5m of beds. Cox and Sumbler, 2002, 299, 302-303. Ashton, 1975. 
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. 
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. 
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. 
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.] 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E072 E080 E089