The BGS Lexicon of Named Rock Units — Result Details
Grassington Grit [Obsolete: use PENDL]
| Computer Code: | GGF | Preferred Map Code: | GG |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Pendleian Substage (CE) — Pendleian Substage (CE) | ||
| Lithological Description: | [Obsolete: use PENDL] A medium- to thickly-bedded, brownish grey, medium- to coarse-grained sandstone and pebbly sandstone, which is massive to coarse bedded; beds of siltstone can occur throughout and locally coals are developed. The unit is interpreted as a delta top sandstone. | ||
| Definition of Lower Boundary: | A sharp upward change in a conformable succession from the predominantly grey mudstone to sandstone-base of first pebbly sandstone bed above the Pendle Grit Member. | ||
| Definition of Upper Boundary: | A sharp upward change in a conformable succession from sandstone to predominantly mudstone - top of the last coarse-grained or pebbly sandstone below the synsedimentary slumped siltstones and sandstones of the Roeburndale Member. | ||
| Thickness: | From 75 to 100 m. | ||
| Geographical Limits: | The Yorkshire Pennines to the east of the River Ribble. | ||
| Parent Unit: | none recorded or not applicable | ||
| Previous Name(s): | Grassington Grit Formation [Obsolete Name and Code: Use GGF]
(-1558)
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| Alternative Name(s): | Warley Wise Grit Brennand Grit Bearing Grit |
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| Stratotypes: | |||
| Partial Type Section | Far Costy Clough, a headwater stream of the River Hodder, near Slaidburn, Lancashire; base not seen. Arthurton and others, 1988. | ||
| Reference(s): | |||
| Dunham, K C and Stubblefield, C J. 1944. The stratigraphy, structure and mineralization of the Greenhow mining area, Yorkshire. Proceedings of the Yorkshire Geological Society, Vol.100, 209-268. | |||
| 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. | |||
| Dakyns, J R. 1892. The geology of the country between Grassington and Wensleydale. Proceedings of the Yorkshire Geological Society. Vol.12, 133-144. | |||
| Arthurton, R S, Johnson, E W, and Mundy, D J C. 1988. Geology of the country around Settle. Memoir of the British Geological Survey, Sheet 60 (England and Wales). | |||
| Moseley, F, 1956. The geology of the Keasden area, west of Settle, Yorkshire. Proceedings of the Yorkshire Geological Society, Vol.30, 331-352. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E051 E060 | |||