The BGS Lexicon of Named Rock Units — Result Details
Collyhurst Sandstone Formation
| Computer Code: | CS | Preferred Map Code: | CS |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Cisuralian Epoch (PLC) — Cisuralian Epoch (PLC) | ||
| Lithological Description: | A soft red sandstone with abundant beds of "millet seed" sand grains alternating with beds of fine-grained sharp sand (Tonks, and others, 1931); some interbedded grey sandstones locally. | ||
| Definition of Lower Boundary: | Lower boundary is a major plane of unconformity, generally on reddened Carboniferous Coal Measures strata. | ||
| Definition of Upper Boundary: | Taken at the point where red mudstone and siltstone, characteristic of the overlying Manchester Marls, become predominant over sandstone. | ||
| Thickness: | Ranges from 0 - 262m in type area and 0 - 715m around Formby (Falcon and Kent, 1960). | ||
| Geographical Limits: | Lancashire and Cheshire. | ||
| Parent Unit: | Appleby Group (APY) | ||
| Previous Name(s): | Permian sandstone [Obsolete Name and Code: Use CS]
(-3964)
Lower Permian Sandstone (-748) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Area | North and east Manchester. Collyhurst is about 3 km north east of Manchester City Centre. (Hull, 1864, fig.9, p.38-39 described a former section at Collyhurst, the precise location of which is now uncertain). | ||
| Reference Section | Measured section recorded in Rochdale Road sewer tunnel (Tonks and others, 1931, fig. 40). | ||
| Reference(s): | |||
| Poole, E G, and Whiteman, A J. 1955. Variations in the thickness of the Collyhurst Sandstone in the Manchester area. Bulletin of the Geological Survey of Great Britain, No. 9, 33-41. | |||
| Hull, E, 1864. The geology of the country around Oldham, including Manchester and its suburbs. Memoir of the Geological Survey of Great Britain, Sheet 88SW. | |||
| Hickling, G, 1918. The geology of Manchester as revealed by borings. Transactions of the Institution of Mining Engineers, Vol.LIV, p.367-417. | |||
| Tonks, L H, Jones, R C B, Lloyd, W and Sherlock, R L, 1931. The geology of Manchester and the south-east Lancashire Coalfield. Memoir of the Geological Survey of England and Wales. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E085 E084 E075 E098 E109 E097 E059 | |||