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
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. 
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