The BGS Lexicon of Named Rock Units — Result Details
Lingmell Tuff Formation
| Computer Code: | LME | Preferred Map Code: | Lme |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Caradoc Series (O4) — Caradoc Series (O4) | ||
| Lithological Description: | Pale-weathered, stratified sequence of garnetiferous silicic tuff, lapilli-tuff and pyroclastic breccia with intercalated volcaniclastic sedimentary rocks. Includes dacite (Scafell Dacite) and rhyolite (Rosthwaite) lavas. | ||
| Definition of Lower Boundary: | Base of diverse sequence of tufflapilli-tuff that usually unconformably overlies the Crinkle Tuff Member (high-grade rhyolitic tuff) in the Airy's Bridge Tuff Formation. | ||
| Definition of Upper Boundary: | Defined by unconformable base of overlying Seathwaite Fell Sandstone Formation (volcaniclastic sandstone). | ||
| Thickness: | 0 to 450m | ||
| Geographical Limits: | Lingmell - Scafell - Longdale; Great Gable - Borrowdale - Rosthwaite; Yewbarrow - Illgill Head, Cumbria. | ||
| Parent Unit: | Borrowdale Volcanic Group (BVG) | ||
| Previous Name(s): | Napes Needle Member [Obsolete Name: Part Of LME]
(NPN)
Lingmell Formation [Obsolete Name and Code: Use LME] (-2908) |
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| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Area | Lingmell (NY 20 08) - Scafell (NY 20 06) - Great Gable (NY 21 10). | ||
| Reference(s): | |||
| Millward, D. 2004. A stratigraphical framework for the Upper Ordovician and Lower Devonian volcanic and intrusive rocks in the English Lake District and adjacent areas. British Geological Survey, Research Report: RR/01/007. | |||
| Millward, D, Johnson, E W, Beddoe-Stephens, B, Young, B, Kneller, B C, Lee, M K, Fortey, N J, Allen, P M, Branney, M J, Cooper, D C, Hirons, S, Kokelaar, B P, Marks, R J, McConnell, B J, Merritt, J W, Molyneux, S G, Petterson, M G, Roberts, B, Rundle, C C, Rushton, A W A, Scott, R W, Soper, N J, and Stone, P. 2000. Geology of the Ambleside district. Memoir of the British Geological Survey, England and Wales, Sheet 38. | |||
| Kneller, B C, Kokelaar, B P and Davis, N C, 1993. The Lingmell Formation. British Geological Survey Technical Report, WA/93/43. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E038 E029 | |||