The BGS Lexicon of Named Rock Units — Result Details

Hibaldstow Limestone

Computer Code: HIL Preferred Map Code: HiL
Status Code: Index Level
Age range: Bajocian Age (JB) — Bajocian Age (JB)
Lithological Description: Limestone, high-energy ooidal and shell bioclastic grainstones, with "non-oolitic limestone containing spar-filled shells" (probably secondarily recrystalized and micritized limestone) at base.
Definition of Lower Boundary: More or less disconformable contact with dominantly micritic low-energy limestone, or mudstone of the Lower Lincolnshire Limestone Member (Kirton Cementstone Beds), overlain by ooidal and bioclastic grainstones.
Definition of Upper Boundary: Disconformable, commonly markedly eroded and karstified contact between ooidal and bioclastic grainstones and non-calcareous, non-marine sandstone, siltstone and mudstone of the overlying Rutland Formation (Thorncroft Sand Member).
Thickness: c.6 to 13m
Geographical Limits: BGS 1:50 000 sheets 80 and 89 or (for Hibaldstow Beds) North Lincolnshire, from Lincoln to the Humber.
Parent Unit: Lincolnshire Limestone Formation (LL)
Previous Name(s): Hibaldstow Limestones (-4706)
Hibaldstow Limestones Member (-4707)
Hibaldstow Oolite (-959)
Hibaldstow Limestone Member (-2239)
Alternative Name(s): Upper Lincolnshire Limestone Member
Stratotypes:
Type Area  Hibaldstow, North Lincolnshire. Gaunt et al., 1992. 
Reference Section  Hibaldstow Airfield No 1 Borehole. (SE90SE/67) 15.24 to 25.33m depth. Gaunt et al. 1992. Fig.20. 
Reference(s):
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:
E080 E089