The BGS Lexicon of Named Rock Units — Result Details

Iron Tors Limestone Member

Computer Code: IT Preferred Map Code: IT
Status Code: Full
Age range: Chadian Substage (CI) — Arundian Substage (CJ)
Lithological Description: Massive, pale grey to grey-brown peloidal calcarenites.
Definition of Lower Boundary: The base of the member is not proved in exposures but it is conjectered to rest conformably upon thin-bedded limestones of the undivided Woo Dale Limestone Formation.
Definition of Upper Boundary: The passage from the massive, pale grey to grey-brown peloidal calcarenites of the Iron Tors Limestone Member to grey to pale grey calcarenites, commonly laminated and including biopelsparites, and subordinate thinly interbedded calcilutites of the Woo Dale Limestone Formation (undivided).
Thickness: Estimated to be 107 m thick.
Geographical Limits: The northern part of the Peak District inlier, limited to Iron Tors (SK 15) in Wolfscote Dale.
Parent Unit: Woo Dale Limestone Formation (WDL)
Previous Name(s): Iron Tors Limestone (-982)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Partial Type Section  Isolated crags, up to 12 m high at Iron Tors (SK 1439 5647; 1448 5648; 1458 5643). Aitkenhead et al., 1985. 
Reference(s):
Aitkenhead, N, Chisholm, J I and Stevenson, I P. 1985. Geology of the country around Buxton, Leek and Bakewell. Memoir of the British Geological Survey, England and Wales Sheet 111. 
Aitkenhead, N and Chisholm, J I. 1982. A standard nomenclature for the Dinantian formations of the Peak District of Derbshire and Staffordshire. Report of the Institute of Geological Sciences, No.82/8. 
Parkinson, D. 1949. The stratigraphy of the Dovedale area, Derbyshire. Staffordshire. Quarterly Journal of Geological Science, Vol.105, 265-294. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E111