The BGS Lexicon of Named Rock Units — Result Details
Barncroft Beck Beds
| Computer Code: | BACB | Preferred Map Code: | BacB |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Arnsbergian Substage (CG) — Arnsbergian Substage (CG) | ||
| Lithological Description: | Variably interbedded sandy micaceous planty siltstones and fine-grained sandstones. | ||
| Definition of Lower Boundary: | Sharp between fossiliferous fissile clayey blue-grey mudstones with limestone nodules and thin sideritic lenses of Caton Shale below and siltstones with sandstones of the Barncroft Beck Beds above. Coincident with the base of the Claughton Member. | ||
| Definition of Upper Boundary: | Base of coarse-grained Nottage Crag Grit above siltstones and fine-grained sandstones of the Barncroft Beck Beds. | ||
| Thickness: | Approximately 85m | ||
| Geographical Limits: | Lancaster Fells. | ||
| Parent Unit: | Claughton Member (CLAU) | ||
| Previous Name(s): | Claughton Flag Series [Obsolete Name and Code: Use BACB]
(*502)
Barncroft Beck Member [Obsolete Name and Code: Use BACB] (-1963) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Partial Type Section | Barncroft Beck and adjacent disused brickpits, Claughton. | ||
| Reference Section | Westend Beck and adjacent disused brickpit, Claughton. | ||
| Reference Section | Greenholes Beck, Caton Moor. | ||
| Reference(s): | |||
| Brandon, A, Aitkenhead, N, Crofts, R G, Ellison, R A, Evans, D J, and Riley, N J. 1998. Geology of the country around Lancaster. Memoir of the British Geological Survey, Sheet 59 (England and Wales). | |||
| Moseley, F, 1954. The Namurian of the Lancaster Fells. Quarterly Journal of the Geological Society of London, Vol.109, 423-454. | |||
| Waters, C N, Waters, R A, Barclay, W J, and Davies, J R. 2009. Lithostratigraphical framework for Carboniferous successions of Southern Great Britain (Onshore). British Geological Survey Research Report, RR/09/01. 184pp. | |||
| Slinger, F C, 1936. Millstone Grit and glacial geology of Caton Moor near Lancaster. Report of the British Association for the Advancement of Science, Blackpool 1936, 345. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E059 | |||