The BGS Lexicon of Named Rock Units — Result Details

Whitcliffe Formation

Computer Code: WHIT Preferred Map Code: Wc
Status Code: Pending Upgrade
Age range: Ludfordian Age (SD) — Ludfordian Age (SD)
Lithological Description: Grey to greenish grey, flaggy calcareous siltstone with shelly limestone beds (at Ludlow); upward passage from argillaceous, flaggy limestone to olive-buff shaly mudstone overlain by buff silty sandstone and mudstone (South Staffordshire).
Definition of Lower Boundary: Above lithological change from limestone to calcareous siltstone (at Ludlow) (Holland and others 1963); Top of highest nodular limestone of Aymestry limestone. (South Staffordshire)
Definition of Upper Boundary: Base of cross bedded sandstone of Downton Castle Sandstone; locally at base of Ludlow Bone Bed.
Thickness: 9-55m: 9-15m South Staffordshire; 55m Ludlow.
Geographical Limits: West Midlands and Welsh Borders.
Parent Unit: Upper Ludlow Shales Group (ULUS)
Previous Name(s): Whitcliffe Formation (WHIT)
Whitcliffe Beds [Obsolete Name And Code: Use WHIT] (WHB)
Upper Ludlow Shales (-3744)
Whitcliffe Group (-4971)
Lower And Upper Whitcliffe Beds (-1915)
Upper And Lower Whitcliffe Formations (-1916)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Reference Section  [Holland, Lawson and Walmsley, 1963, locality 6] Old quarry face, south (right) bank of River Teme, 260m west of Ludford Bridge. 
Partial Type Section  [Holland, Lawson and Walmsley, 1963, locality 3] SW (right) bank River Teme, cliff section 170m south of Dinham Bridge. 
Partial Type Section  [White and Lawson, 1978, locality 839] Deer Park road section, Mortimer Forest. 
Reference Section  [Whitehead and Pocock, 1947, p.17-18] Mineral railway cutting, adjacent to Lodge Farm Reservoir, Saltwells. 
Partial Type Section  [Holland, Lawson and Walmsley, locality 7] Whitcliffe Road (`Ludford Lane') section exposing uppermost strata below the Ludlow Bone Bed. 
Reference(s):
Holland, C H, Lawson, J D and Walmsley, V G, 1959. A revised classification of the Ludlovian succession at Ludlow. Nature, London, 1037-1039. 
Lawson, J D and White, D E, 1989. The Ludlow Series in the Ludlow area, 73-90 in A global standard for the Silurian system. Holland, C H and Bassett, M G (editors). (Cardiff: National Museum of Wales). 
Cocks, L R M, Holland, C H, Rickards, R B and Strachan, I, 1971. A correlation of Silurian rocks in the British Isles. Geological Society of London, Special Report No.1. 
White, D E and Lawson, J D, 1978. The stratigraphy of new sections in the Ludlow Series of the type area, Ludlow, Salop, England. Report of the Institute of Geological Science, 78/30, 1-10. 
Cocks, L R M, Holland, C H and Rickards, B. 1992. A revised correlation of Silurian rocks in the British Isles. Geological Society of London Special Report. No.21, 32pp. 
Whitehead, T H and Eastwood, T, 1927. The geology of the southern part of the South Staffordshire Coalfield. Memoir of the Geological Survey of Great Britain. 
Holland, C H, Lawson, J D and Walmsley, V G, 1963. The Silurian Rocks of the Ludlow District, Shropshire. Bulletin of the British Museum (Natural History), Geology Series. (London: British Museum (Natural History)). 93-171. 
Holland, C H, Lawson, J D, Walmsley, V G and White, D E. 1980. Ludlow stages. Silurian Series and stages decisions concerning chronostratigraphy. Lethaia, Vol.13, p.238, 268. 
Whitehead, T H and Pocock, R W. 1947. Geology of the country around Dudley and Bridgnorth. Memoir of the British Geological Survey, Sheet 167. (England and Wales). 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E168 E181