| Computer Code: |
WFC |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Hirnantian Age (OH)
— Hirnantian Age (OH) |
| Lithological Description: |
Well cemented pebble conglomerate with a sandy matrix. Round to subround clasts include underlying Dent Group lithologies, Ingleton Group, vein quartz and andesite.
Ashgill (Hirnantian) based on the Zone 8 fauna from strata immediately overlying the conglomerate.
Kneller et al. (1994) speculatively correlated the Wharfe Conglomerate Member directly with similar lithofacies in the upper part of the Ash Gill Mudstone Formation. |
| Definition of Lower Boundary: |
Taken at the base of conglomerate, resting on an erosion surface within siltstones of the Sowerthwaite Siltstone Formation. |
| Definition of Upper Boundary: |
Taken at the lithology change to overlying well laminated sandy siltstone of the main part of the Sowerthwaite Siltstone Formation. |
| Thickness: |
Up to 2 m. |
| Geographical Limits: |
none recorded or not applicable
|
| Parent Unit: |
Sowerthwaite Formation (SOW)
|
| Previous Name(s): |
Wharfe Conglomerate [Obsolete Name and Code: Use WFC]
(-3758)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Section |
Austwick Beck Head [SD 7764 7186], in the Austwick inlier (Arthurton et al., 1988, p. 11). |
| Reference(s): |
| King, W B R and Wilcockson, W H, 1934. The Lower Palaeozoic rocks of Austwick and Horton-in-Ribblesdale, Yorkshire. Quarterly Journal of the Geological Society of London, Vol.90, 7-31. |
| 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. |
| Arthurton, R S, Johnson, E W, and Mundy, D J C. 1988. Geology of the country around Settle. Memoir of the British Geological Survey, Sheet 60 (England and Wales). |
| 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. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
| none recorded or not applicable |
