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 [Obsolete Name and Code: Use HHR]
(-4705)
High Haume Volcanic Formation [Obsolete Name and Code: Use HHR] (-1594) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Area | Outcrop near High Haume Farm, north east of Dalton in Furness, Cumbria. | ||
| Type Area | Along the crest of High Haume ridge, near High Haume Farm. | ||
| Reference(s): | |||
| 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. | |||
| 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. | |||
| Rose, W C C, and Dunham, K C. 1977. Geology and hematite deposits of South Cumbria. Economic Memoir of the Geological Survey of Great Britain, Sheet 58, part 48 (England and Wales). | |||
| 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. | |||
| 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. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E048 | |||