The BGS Lexicon of Named Rock Units — Result Details
Wrighthow Basalt Member
| Computer Code: | WGTB | Preferred Map Code: | WgtB |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Caradoc Series (O4) — Caradoc Series (O4) | ||
| Lithological Description: | Dark greenish grey scoriaceous pyroxene-phyric basalt lava flows and their autobreccias. | ||
| Definition of Lower Boundary: | Not exposed, but taken at the change from porphyritic andesite to scoriaceous basalt. | ||
| Definition of Upper Boundary: | Not exposed/faulted. | ||
| Thickness: | c.200 - 300m | ||
| Geographical Limits: | Wrighthow Crags and Foxbield Wood - 2km north of Santon Bridge, Cumbria. | ||
| Parent Unit: | Birker Fell Andesite Formation (BFA) | ||
| Previous Name(s): | Wrighthow Member [Obsolete Name and Code: Use WGTB]
(-1914)
Wrighthow Basalt [Obsolete Name and Code: Use WGTB] (-4969) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Area | Wrighthow Crags, 500m north of Hollins Farm. | ||
| 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. | |||
| Petterson, M G, Beddoe-Stephens, B, Millward, D and Johnson, E W, 1992. A pre-caldera plateau-andesite field in the Borrowdale Volcanic Group of the English Lake District. Journal of the Geological Society, London, Vol. 149, 889-906. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E038 E037 | |||