The BGS Lexicon of Named Rock Units — Result Details

Scale Beck Till Member

Computer Code: SBTI Preferred Map Code: SB
Status Code: Full
Age range: Devensian Stage (QD) — Devensian Stage (QD)
Lithological Description: Reddish brown cobbly sandy clay diamicton, very compact, generally massive and matrix-supported, containing clasts mainly of Borrowdale Volcanic Group rocks (rhyolite, welded tuff, slate), granite and granophyre from the Lake District. Has tightly clustered clast fabric typical of a lodgement till.
Definition of Lower Boundary: Sharp, irregular, unconformable contact with bedrock.
Definition of Upper Boundary: Ground surface, or sharp, undulating, unconformable contact with overlying glaciolacustrine laminated silt and clay (Bark Butts Silt Member); glaciofluvial cobble gravel (Whin Garth Gravel Member); or by various Flandrian deposits such as peat and alluvium.
Thickness: To at least 6m
Geographical Limits: Western side of Lake District, inland of the limit of the "Gosforth Oscillation".
Parent Unit: Blengdale Glacigenic Formation (BLGL)
Previous Name(s): Boulder Clay Of Lake District Provenance (-1164)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  Waterfall section (NY00NE CA701) 120m downstream of Bleng Bridge, Blengdale, Lake District. Base of unit not exposed but very probably overlies bedrock. Nirex, 1997. 
Reference(s):
Merrit, J W and Auton, C A. 2000. An outline of the lithostratigraphy and depositional history of Quaternary deposits in the Sellafield district, west Cumbria. Proceedings of the Yorkshire Geological Society, Vol.53, 129-154 
Merritt, J W and Auton, C A. 1997. Quaternary lithostratigraphy of the Sellafield district. Nirex Science Report SA/97/045 (Issue 2.0). [Report prepared for UK Nirex Ltd. 69pp, 5 tables, 20 figures, 14 enclosures and one appendix.] 
Akhurst, M C, Chadwick, R A, Holliday, D W, McCormac, M, McMillan, A A, Millward, D, Young, B, Ambrose, K, Auton, C A, Barclay, W J, Barnes, R P, Beddoe-Stephens, B, James, J C W, Johnson, H, Jones, N S, Glover, B W, Hawkins, M P, Kimbell, G S, MacPherson, K A T, Merritt, J W, Milodowski, A E, Riley, N J, Robins, N S, Stone, P and Wingfield, R T R. 1997. The geology of the west Cumbria district. Memoir of the British Geological Survey, Sheets 28, 37 and 47 (England and Wales). 138pp. 
Trotter, F M, Hollingworth, S E, Eastwood T and Rose, W C C. 1937. Gosforth District. Geological Survey Memoir, England and Wales, Sheet 37. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable