The BGS Lexicon of Named Rock Units — Result Details

Beckingham Member

Computer Code: BKHM Preferred Map Code: Bkg
Status Code: Full
Age range: Sinemurian Age (JS) — Sinemurian Age (JS)
Lithological Description: Bluish-grey shaly mudstones, with rare thin limestones comprising a few per cent of the sequence.
Definition of Lower Boundary: Top of highest limestone in Granby Member.
Definition of Upper Boundary: Base of (ferruginous) Stubton Limestones in Foston Member, (see Brandon and others, 1990, for details of Stubton Limestones and other beds within Members).
Thickness: 21m to 24m; 22.10m in borehole F/B5.
Geographical Limits: East Midlands Shelf; thickens southwards towards London Platform; northwards, limestone beds develop within mudstone sequence.
Parent Unit: Scunthorpe Mudstone Formation (SMD)
Previous Name(s): Bucklands Clays (-2613)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Reference Section  Fulbeck Airfield Borehole F/B1 (SK85SE/25), depths 17.9m to 40.5m. 
Type Section  Fulbeck Airfield Borehole F/B5 (SK95SW/17), depths 34.65m to 56.75m. 
Reference(s):
Sumbler, M G, 1987. Geological Notes and Local Details for 1:10,000 Sheet SK85SE (Beckingham). British Geological Survey Technical Report. 
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. 
Sumbler, M G, 1987. Geological Notes and Local Details for 1:10,000 Sheet SK95SW (Brant Broughton). British Geological Survey Technical Report. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E127 E142