The BGS Lexicon of Named Rock Units — Result Details
Lickle Tuff Formation
Computer Code: | LICK | Preferred Map Code: | Lick |
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Status Code: | Full | ||
Age range: | Caradoc Series (O4) — Caradoc Series (O4) | ||
Lithological Description: | Massive unit of rhyolitic and dacitic welded tuff and lapilli-tuff with subordinate intercalated volcaniclastic sandstone; intruded by andesite and basaltic andesite sills. | ||
Definition of Lower Boundary: | Base of pyroclastic rocks of dacitic or rhyolitic composition that unconformably overlie the Duddon Hall Tuff (andesitic tuff), Dunnerdale Sandstone (volcaniclastic sandstone) or the Wallowbarrow Tuff (andesitic lapilli tuff) formations. | ||
Definition of Upper Boundary: | Defined by base of overlying formations including Caw (volcaniclastic breccia and sandstone), Lag Bank (dacitic lapilli tuff) and Low Water (dacitic tuff) formations. | ||
Thickness: | 200 - 500m | ||
Geographical Limits: | Ulpha Basin and Coniston Fells, Lickle Valley (SD 2493 to 2190) to Wallowbarrow Heald (SD 210 970) and Turner Hall (SD 230 960); Buck Pike (SD 260 970) to Knott Head (NY 300 020), Cumbria. | ||
Parent Unit: | Borrowdale Volcanic Group (BVG) | ||
Previous Name(s): | Lickle Formation [Obsolete Name and Code: Use LICK]
(-2291)
Lickle Rhyolites [Obsolete Name and Code: Use STPI, LICK] (-1657) |
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Alternative Name(s): | none recorded or not applicable | ||
Stratotypes: | |||
Type Area | Dunnerdale Fells to the south west of Caw. | ||
Reference Section | From Tarn Hill to Great Stickle. | ||
Reference Section | 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, 1956. (Undivided Lickle Rhyolites). The Borrowdale Volcanic Series of the Dunnerdale Fells, Lancashire. Liverpool and Manchester Geological Journal, Vol.1, p.428-449. | |||
1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
E038 E048 |