The BGS Lexicon of Named Rock Units — Result Details

Lincoln Hill Limestone Bed

Computer Code: LCHL Preferred Map Code: LH
Status Code: Full
Age range: Sinemurian Age (JS) — Sinemurian Age (JS)
Lithological Description: Thin bed of grey, silty, shelly, ferruginous, bioclastic limestone. Fauna of forams, bivalves, gastropods, ammonites, bryozoans and echinoderms. Although mapped only locally, is thought to be laterally persistent.
Definition of Lower Boundary: Change up from mudstone with limestone nodules of the Dry Doddington Nodule Bed; at 38.62m depth in type section Fulbeck Airfield Borehole F/B5 (SK95SW/17).
Definition of Upper Boundary: Change up into bluish grey, shaly mudstone of the undifferentiated Beckingham Member; at 38.50m depth in type section Fulbeck Airfield Borehole F/B5 (SK95SW/17).
Thickness: Up to 0.3m; 0.12m in type section.
Geographical Limits: East Midlands: north Leicestershire to Linclonshire. Not recognised in north Lincolnshire, or south Leicestershire, where it passes south either into part of the more argillaceous Rugby Limestone Member of the Blue Lias Formation or into part of the mudstone-dominated Charmouth Mudstone Formation.
Parent Unit: Beckingham Member (BKHM)
Previous Name(s): Lincoln Hill Limestone (-2284)
Alternative Name(s): none recorded or not applicable
Type Section  Fulbeck Airfield Borehole F/B5 (SK95SW/17) 
Brandon, A, Sumbler, M G and Ivimey-Cook, H C, 1990. A revised lithostratigraphy for the Lower and Middle Lias (Lower Jurassic) east of Nottingham, England. Proceedings of the Yorkshire Geological Society, Vol.48, 121-141. 
Berridge, N G, Pattison, J, Samuel, M D A, Brandon, A, Howard, A S, Pharaoh, T C and Riley, N J. 1999. Geology of the Grantham district. Memoir of the British Geological Survey, sheet 127 (England and Wales). 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E127 E126