The BGS Lexicon of Named Rock Units — Result Details
Scalehow Tuff Formation
| Computer Code: | SCW | Preferred Map Code: | Scw |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Caradoc Series (O4) — Caradoc Series (O4) | ||
| Lithological Description: | Andesitic and dacitic lapilli-tuff, and intercalated tuff, with some bedded volcaniclastic sandstone in the upper part of the formation, and some accretionary lapilli-tuff in the tuff sequence. | ||
| Definition of Lower Boundary: | Taken at the sharp change from andesite and dacite sheets of the Birker Fell Andesite Formation to a dominantly pyroclastic sequence, along a conformable contact. | ||
| Definition of Upper Boundary: | Defined by the base of silicic ignimbrites of the Whelter Knotts Formation. | ||
| Thickness: | 0 - 340 m thick. | ||
| Geographical Limits: | Patterdale Common, Martindale and Riggindale, south-east of Ullswater, Cumbria. | ||
| Parent Unit: | Borrowdale Volcanic Group (BVG) | ||
| Previous Name(s): | Scalehow Formation [Obsolete Name and Code: Use SCW]
(-3662)
Birk Fell Group [Obsolete Name and Code: Use SCW] (-1170) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Area | From Hare Shaw to Scalehow Beck, Birk Fell, Ullswater, Cumbria. Woodhall, 2000. | ||
| Reference(s): | |||
| Woodhall, D G. 2000. The geology of the Haweswater and Martindale areas of the north-eastern Lake District. British Geological Survey Technical Report WA/00/55. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E030 E039 | |||