The BGS Lexicon of Named Rock Units — Result Details

Oxendale Tuff

Computer Code: OXT Preferred Map Code: OxT
Status Code: Full
Age range: Caradoc Series (O4) — Caradoc Series (O4)
Lithological Description: Pink weathered rhyolitic, lava-like, welded tuff.
Definition of Lower Boundary: Base of rhyolitic, lava-like, welded tuff overlies parallel bedded, andesitic tuff (Whorneyside Tuff Formation). Essentially conformable but with angular discordances where the andesitic tuffs are slumped.
Definition of Upper Boundary: At base of overlying main part of the Long Top Tuff Member: rhyolitic tuff and lapilli-tuff that is of lower-grade (less densely welded).
Thickness: 0-100m
Geographical Limits: Oxendale, Great Langdale and Coniston Fells, Cumbria.
Parent Unit: Long Top Tuff Member (LTT)
Previous Name(s): Oxendale Member (-1110)
Alternative Name(s): none recorded or not applicable
Reference Section  Seathwaite Fells, southeast of Seathwaite Tarn on Green Haw Top. 
Type Area  Representative sections through the tuff are present in Hell Gill (NY2590 0545) and on the south side of the The Band at (NY 2670 0546) 
Branney, M J, Davis, N C, Kokalaar, B P and McConnell, B J. 1993. The Airy's Bridge Formation in the central Fells. British Geological Survey Technical Report WA/93/41 
1:50K maps on which the lithostratigraphical unit is found, and map code used: