The BGS Lexicon of Named Rock Units — Result Details
Barnby Member
Computer Code: | BNBM | Preferred Map Code: | Bby |
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Status Code: | Full | ||
Age range: | Hettangian Age (JH) — Hettangian Age (JH) | ||
Lithological Description: | Grey calcareous mudstones with rare thin argillaceous limestones comprising c.1% of the sequence. | ||
Definition of Lower Boundary: | Top of highest limestone bed in Barnstone Member. | ||
Definition of Upper Boundary: | Base of lowest (unnamed) limestone bed in Granby Member (see references for details of beds within members). | ||
Thickness: | 22.05 metres in borehole F/B5 (SK95SW/17). | ||
Geographical Limits: | East Midlands Shelf area: South Yorkshire to north flank of London Platform. | ||
Parent Unit: | Scunthorpe Mudstone Formation (SMD) | ||
Previous Name(s): | Angulatum Clays [Obsolete Name And Code: Use BNBM]
(ANGC)
Barnby Clays [Obsolete Name and Code: Use BNBM] (-1367) Angulata Clays [Obsolete Name and Code: Use SMD, BNBM] (-2626) |
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Alternative Name(s): | none recorded or not applicable | ||
Stratotypes: | |||
Type Section | Fulbeck Airfield Borehole F/B5 (SK95SW/17), depths 87.35 metres to 109.40 metres. | ||
Reference Section | Fulbeck Airfield Borehole F/B1 (SK85SE/25), depths 70.9 metres to 92.8 metres. | ||
Reference(s): | |||
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 SK85SE (Beckingham). British Geological Survey Technical Report. | |||
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 |