The BGS Lexicon of Named Rock Units — Result Details

Catgill Wood Sand And Gravel Member

Computer Code: CGWD Preferred Map Code: notEntered
Status Code: Full
Age range: Devensian Stage (QD) — Devensian Stage (QD)
Lithological Description: Clast-supported, poorly sorted gravel with lenses of sand. Clasts are mainly subangular to rounded, up to cobble size and composed of red (Permo-Triassic) and yellow (Carboniferous) sandstones, and coal.
Definition of Lower Boundary: Sharp erosional contact on diamictons of the Low Wath Till Member.
Definition of Upper Boundary: At the type section conformably overlain by silt and clay of the Ehen Valley Silt Member of the Seascale Glacigenic Formation.
Thickness: 1.2m thick at type section but up to 10m thick in boreholes around Egremont.
Geographical Limits: 1:50k sheets 37 Gosforth and 38 Whiteheaven, Western Cumbria.
Parent Unit: Seascale Glacigenic Formation (SEAG)
Previous Name(s): Middle Sands and Gravels [Obsolete Name and Code: Use GFSA, SEAG, CGWD, LOGG, PLSG, PFS, EVSI, THBG, EVSG] (-122)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Type Section  'Rothersyke Scar' river cliff section, western side of River Ehen, west Cumbria, between Rothersyke House and Low Mill; c.300m west of Thornhill village. Nirex Science Report SA/97/045 (Issue 2.0). 1997 
Reference Section  River cliff section at Low Wath, c.200m southeast of Cleator Moor, west Cumbria. BGS Nirex log NY01SW ME4). Nirex Science Report 768 (1995). 
Reference(s):
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.] 
Merritt, J W, Auton, C A, Browne, M A E, Neilson, G and McMillan, A A. 1995. Characterisation of the onshore Quaternary deposits around Sellafield, Cumbria, Phase II. Nirex Science Report 768. 
Eastwood T, and others. 1968. Geology of the country around Whitehaven. Memoir of the Geological Survey of Great Britain, Sheet 28 (England and Wales). 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
none recorded or not applicable