The BGS Lexicon of Named Rock Units — Result Details
Yewbank Formation
| Computer Code: | YBK | Preferred Map Code: | YBK |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Gorstian Age (SG) — Gorstian Age (SG) | ||
| Lithological Description: | Sandstone. | ||
| Definition of Lower Boundary: | Conformably overlies the Moorhowe Formation of the Coniston Group. | ||
| Definition of Upper Boundary: | Conformably overlain by the Bannisdale Formation. | ||
| Thickness: | c.750m | ||
| Geographical Limits: | Southern Lake District and northwest Pennines. | ||
| Parent Unit: | Coniston Group (CTG) | ||
| Previous Name(s): | Yewbank Member [Obsolete Name and Code: Use YBK]
(-4410)
Yewbank Sandstone (in part) [Obsolete Name and Code: Use YBK] (-4987) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Area | Southwest slopes of Yewbank. | ||
| Reference(s): | |||
| Moseley F. 1984. Lower Palaeozoic lithostratigraphical classification in the English Lake District. Geological Journal, Vol. 19, p. 239-247. | |||
| Marr J E. 1892. On the Wenlock and Ludlow strata of the Lake District. Geological Magazine, Vol. 9, p 534-541. | |||
| Kneller, B C. 1990. The Wenlock rocks of sheet 38 (Ambleside). British Geological Survey Technical Report, WA/90/64 | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E038 E048 | |||