The BGS Lexicon of Named Rock Units — Result Details

High Haume Tuff Formation

Computer Code: HHR Preferred Map Code: HHR
Status Code: Full
Age range: Rawtheyan Stage (OW) — Rawtheyan Stage (OW)
Lithological Description: Welded rhyolitic tuff.
Definition of Lower Boundary: Probable non-sequence: at base of rhyolitic tuff, above calcareous silty mudstone of the Broughton Moor Formation or, where this is absent, the Kirkley Bank Formation.
Definition of Upper Boundary: Probably conformable, at top of rhyolitic tuff and base of overlying silty mudstone or calcareous mudstone of the Ashgill Formation.
Thickness: c.25m
Geographical Limits: Low Furness, Ordovician inlier, south Cumbria. Correlatives occur elsewhere within the Windermere Supergroup outcrop of Northern England.
Parent Unit: Dent Group (DNT)
Previous Name(s): High Haume Rhyolite (-4705)
High Haume Volcanic Formation (-1594)
Alternative Name(s): none recorded or not applicable
Type Area  Along the crest of High Haume ridge, near High Haume Farm 
Type Area  Outcrop near High Haume Farm, north east of Dalton in Furness, Cumbria. 
Soper, N J, 1994. The Lower Palaeozoic rocks of 1:10,000 sheets SD28SW, SD27NW and SD27NE, Low Furness, Cumbria, British Geological Survey Technical Report WA/94/61. 
Johnson, E W, Soper, N J, Burgess, I C, Ball, D F, Beddoe-Stephens, B, Carruthers, R M, Fortey, N J, Hirons, S, Merritt, J W, Millward, D, Roberts, B, Walker, A B and Young, B. 2001. Geology of the country around Ulverston. Memoir of the British Geological Survey, England and Wales, Sheet 48. 
Rose, W C C. 1977. Geology and Hematite deposits of South Cumbria. Economic Memoir for 1:50,000 Sheet 58 and southern part of Sheet 48. Memoir of the geological Survey of Great Britain. 
Kneller, B C, Scott R W, Soper N J, Johnson E W and Allen P M, 1994. Lithostratigraphy of the Windermere Supergroup, Northern England. Geological Journal, Vol. 29, 219-240. 
1:50K maps on which the lithostratigraphical unit is found, and map code used: