| 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 [Obsolete Name and Code: Use OXT]
(-1110)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| 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) |
| Reference(s): |
| 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: |
|
E038
|
