| Computer Code: |
WIN |
Preferred Map Code: |
Win |
| Status Code: |
Full |
| Age range: |
Late Ordovician Epoch (OLA)
— Pridoli Epoch (SO) |
| Lithological Description: |
The term Windermere Supergroup was introduced by Kneller et al. (1994) for the folded and cleaved marine carbonate and clastic sedimentary rocks that lie above the unconformity at the top of the Caradoc volcanic rocks in the Lake District and adjacent inliers in northern England, but below unconformably overlying Devonian Old Red Sandstone or basal Carboniferous rocks. The oldest strata, assigned to the Dent Group, are Late Ordovician in age, whilst the remainder are Silurian. |
| Definition of Lower Boundary: |
The unconformity at the top of the Caradoc volcanic rocks in the Lake District and adjacent inliers in northern England. |
| Definition of Upper Boundary: |
Unconformably overlain by Devonian Old Red Sandstone or basal Carboniferous rocks. |
| Thickness: |
c. 4500 m. |
| Geographical Limits: |
Lake District and adjacent inliers in northern England. |
| Parent Unit: |
Not Applicable (-)
|
| Previous Name(s): |
Windermere Group [Obsolete Name and Code: Use TNTH, WIN]
(-2491)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| none recorded or not applicable |
| Reference(s): |
| Millward, D, and Stone, P. 2012. Stratigraphical framework for the Ordovician and Silurian sedimentary strata of northern England and the Isle of Man. British Geological Survey Research Report, RR/12/04. 119pp. |
| Kneller, B C, Scott R W, Soper N J, Johnson E W and Allen P M, 1994. Lithostratigraphy of the Windermere Supergroup, Northern England. Geological Journal, Vol. 29, 219-240. |
| Moseley F. 1984. Lower Palaeozoic lithostratigraphical classification in the English Lake District. Geological Journal, Vol. 19, p. 239-247. |
| Stone P, Millward, D, Young, B, Clarke, S M, McCormac, M and Lawrence, D J D. 2010. British Regional Geology: Northern England (fifth edition) (Keyworth, Nottingham: British Geological Survey). |
| Brenchley, P J, and Rawson, P F (editors). 2006. The Geology of England and Wales. Second edition. (London: The Geological Society.) |
| Waters, C N, Gillespie, M R, Smith, K, Auton, C A, Floyd, J D, Leslie, A G, Millward, D, Mitchell, W I, McMillan, A A, Stone, P, Barron, A J M, Dean, M T, Hopson, P M, Krabbendam, M, Browne, M A E, Stephenson, D, Akhurst, M C, and Barnes, R P. 2007. Stratigraphical Chart of the United Kingdom: Northern Britain. (British Geological Survey.) |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E038
E023
E040
E048
E049
E039
|
