The BGS Lexicon of Named Rock Units — Result Details
Woundale Tuff Formation
| Computer Code: | WOU | Preferred Map Code: | Wou |
|---|---|---|---|
| Status Code: | Full | ||
| Age range: | Caradoc Series (O4) — Caradoc Series (O4) | ||
| Lithological Description: | Heterogenous andesitic tuff and lapilli-tuff, with impersistent interbeds of volcaniclastic sandstone, particularly in the upper part of the Formation. | ||
| Definition of Lower Boundary: | Taken at the change from massive, uniform, dacitic lapilli-tuff of the Froswick Tuff Formation, to variable andesitic tuff and lapilli-tuff lithofacies, at a generally conformable contact interpreted to be an erosion surface of low relief. | ||
| Definition of Upper Boundary: | Defined by the base of the overlying Seathwaite Fell Sandstone Formation, which here is an erosion surface overlain by well bedded volcaniclastic sedimentary rocks. | ||
| Thickness: | To 800m | ||
| Geographical Limits: | From Stock Ghyll, Ambleside to Troutbeck, Kentmere and Longsleddale to Mosedale and around High Street, eastern Lake District. | ||
| Parent Unit: | Borrowdale Volcanic Group (BVG) | ||
| Previous Name(s): | Woundale Formation [Obsolete Name and Code: Use WOU]
(-1929)
Froswick Tuffs [Obsolete Name and Code: Use WOU, FSW] (-264) Woundale Tuff [Obsolete Name and Code: Use WOU] (-1284) |
||
| Alternative Name(s): | none recorded or not applicable | ||
| Stratotypes: | |||
| Type Area | Woundale, Hart Crag and Doup Crag, on the north side of the A592 between Troubeck and the Kirkstone Pass in the Kendal area of Cumbira. | ||
| 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. | |||
| Mitchell, G H, 1929. The succession and structure of the Borrowdale Volcanic Series in Troutbeck, Kentmere and the western part of Long Sleddale (Westmorland). Quarterly Journal of the Geological Society of London, Vol. 85, 9-44. | |||
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: | |||
| E030 E039 | |||