The BGS Lexicon of Named Rock Units — Result Details
Surgill Shale
| Computer Code: | SLSH | Preferred Map Code: | SlSh |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Pendleian Substage (CE) — Pendleian Substage (CE) | ||
| Lithological Description: | Grey, shaly, commonly sandy, finely micaceous siltstones and mudstones with thin subordinate sharp-soled sandstones. | ||
| Definition of Lower Boundary: | Top of highest mappable thick coarse-grained sandstone of Pendle Grit, or top of unit containing thick massive coarse-grained sandstones where individual sandstones not mapped. | ||
| Definition of Upper Boundary: | Overlain by sharp base of Grassington Grit, Brennand Grit or Warley Wise Grit; commonly an unconformity. | ||
| Thickness: | To 245m. Commonly absent. | ||
| Geographical Limits: | Craven Basin, northwest England. | ||
| Parent Unit: | Pendle Grit Member (PG) | ||
| Previous Name(s): | Surgill Shales [Obsolete Name and Code: Use SLSH]
(-2429)
Pendle Shale Formation [Obsolete Name and Code: Use SLSH] (-3036) Surgill Shale Member [Obsolete Name and Code: Use SLSH] (-3037) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Area | Lothersdale. | ||
| Reference Section | Folds Clough and northerly tributary gulley, Brennand Fell. | ||
| Reference Section | Surgill Beck, Lothersdale area | ||
| Reference(s): | |||
| Bray, A. 1927. The Carboniferous sequence between Lothersdale and Cowling (Colne). Journal of the Manchester Geological Association, Vol. 1, 44-57. | |||
| Sims, A P. 1988. The evolution of a sand-rich basin-fill sequence in the Pendleian (Namurian, E1c) of north-west England. Unpublished PhD thesis, University of Leeds, Department of Earth Sciences. | |||
| Baines, J F. 1977. The stratigraphy and sedimentology of the Skipton Moor Grits (Namurian (E1c) and their lateral equivalents. Unpublished Ph.D. thesis, University of Keele, 1977. | |||
| 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: | |||
| E059 | |||