The BGS Lexicon of Named Rock Units — Result Details

Cocklett Scar Sandstone

Computer Code: COSS Preferred Map Code: CoSS
Status Code: Full
Age range: Arnsbergian Substage (CG) — Arnsbergian Substage (CG)
Lithological Description: Interbedded fine- to medium-grained, thin to thick-bedded sandstones and grey micaceous shaly siltstones.
Definition of Lower Boundary: Rapidly gradational at incoming of persistent sandstones interbedded with siltstones above shaly mudstones with siderite mudstones above the Eumorphoceras ferrimontanum Marine Band.
Definition of Upper Boundary: Rapidly gradational at top of persistent sandstones interbedded with siltstones below calcareous siltstones with very few sandstone beds of the Close Hill Siltstone.
Thickness: 60 - c.100m.
Geographical Limits: Lancaster Fells (Lancaster 1:50 000 sheet).
Parent Unit: Roeburndale Member (RBL)
Previous Name(s): Cocklett Scar Sandstone Member (-812)
Cocklett Scar Flags (-157)
Stonehead Sandstone [Obsolete Name And Code: Use COSS] (STO)
Alternative Name(s): none recorded or not applicable
Partial Type Section  Cocklett Scar, a cliff in the north bank of Foxdale, 1400m upstream of Littledale Hall, Littledale, Caton, Lancaster. 
Reference Section  Ragill Beck, 100m upstream from confluence with Deep Clough, Littledale area, Caton, Lancaster. 
Reference Section  Incised gulley in Lythe Brow bank, 1600m northnortheast of Quernmore Church, Quernmore, Lancaster. 
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. 
Brandon, A. 1992. Geology of the Littledale area. British Geological Survey Technical Report No. WA/92/16. 
Brandon, A, Aitkenhead, N, Crofts, R G, Ellison, R A, Evans, D J and Riley, JN J, 1998. Geology of the country around Lancaster. Memoir of the British Geological Survey, Sheet 59 (England and Wales). 
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. 
1:50K maps on which the lithostratigraphical unit is found, and map code used: