The BGS Lexicon of Named Rock Units — Result Details

Bewcastle Member

Computer Code: BWCB Preferred Map Code: BEWC
Status Code: Full
Age range: Chadian Substage (CI) — Arundian Substage (CJ)
Lithological Description: Cyclical sequences of sandstone, siltstone, mudstone and thin limestones, locally dolomitic (cementstones); locally thin seatearths and nodular algal beds.
Definition of Lower Boundary: Defined at the base of the Bogside Limestone. Conformable on Lynebank Member (Bewcastle).
Definition of Upper Boundary: Conformable upper boundary with the base of Main Algal One of the Main Algal Member (Lyne Formation) at Bewcastle.
Thickness: c. 180 m (Bewcastle).
Geographical Limits: Northumberland - Solway Basin. Bewcastle district (England Sheet 12).
Parent Unit: Lyne Formation (LYNE)
Previous Name(s): Bewcastle Beds [Obsolete Name and Code: Use BWCB] (-1406)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Bewcastle Member (Bogside Limestone to base of Main Algal Member), Ashy Cleuch upstream from Stockastead Quarry (Day, 1970). 
Reference(s):
Day, J B W and others, 1970. Geology of the neighbourhood around Bewcastle. Memoir of the British Geological Survey, Sheet 12. (England and Wales). 
Dean, M T, Browne, M A E, Waters, C N and Powell, J H. 2011. A lithostratigraphical framework for the Carboniferous successions of northern Great Britain (onshore). British Geological Survey Research Report, RR/10/007. 165pp. 
Leeder, M R. 1974. Lower Border Group (Tournaisian) fluvio-deltaic sedimentation and palaeogeography of the Northumberland Basin. Proceedings of the Yorkshire Geological Society, Vol.40, 129 - 180. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E012