The BGS Lexicon of Named Rock Units — Result Details
Paddy End Tuff Member
| Computer Code: | PER | Preferred Map Code: | PER |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Caradoc Series (O4) — Caradoc Series (O4) | ||
| Lithological Description: | Pink-weatherd rhyolitic tuff, densely welded and locally rheomorphic. | ||
| Definition of Lower Boundary: | Base of rhyolitic tuff, overlies an erosion surface within the Lickle Tuff Formation resting on volcaniclastic sandstone and Kiln Bank Tuff Member dacitic tuff in the Ulpha Basin and with marked unconformity on the andesitic bedded tuff of the Duddon Hall Tuff Formation or silicic pyroclastic rocks of the Airy's Bridge Tuff Formation in the Coniston Fells. | ||
| Definition of Upper Boundary: | Overlain by younger parts of the Lickle Tuff Formation in the Ulpha Basin (volcaniclastic sandstone and rhyolitic tuff (Stickle Pike Member) or by the Lag Bank Formation (dacitic tuff) or Low Water Formation (dacitic tuff) in the Coniston Fells. | ||
| Thickness: | Ulpha Basin 30 - 100m. Coniston Fells 150 - 170m | ||
| Geographical Limits: | Ulpha Basin and Coniston Fells. Great Stickle (SD 211 915) to Turner Hall (SD 230 960) and Appletree Worth (2442 9250); Buck Ake (SD 260 970) to Knott Head (NY 300 020), Little Langdale, Cumbria. | ||
| Parent Unit: | Lickle Tuff Formation (LICK) | ||
| Previous Name(s): | Paddy End Member [Obsolete Name and Code: Use PER]
(-2971)
Paddy End Rhyolite [Obsolete Name and Code: Use PER] (-2972) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Area | Coniston Old Man in the ground between Goats Water (SD 266 976) and Levers Water (SD 280 993). | ||
| Reference Section | From Tarn Hill to Great Stickle. | ||
| Reference Section | Dunnerdale Fells between Yew Pike and Stickle Tarn. | ||
| Reference(s): | |||
| 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. | |||
| Mitchell, G H, 1940. The Borrowdale Volcanic Series of Coniston, Lancashire. Quarterly Journal of the Geological Society of London, Vol.96, p.301-319. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E038 E048 | |||