The BGS Lexicon of Named Rock Units — Result Details

South Leicestershire Diorite Complex

Computer Code: SLED Preferred Map Code: SL
Status Code: Full
Age range: Caradoc Series (O4) — Caradoc Series (O4)
Lithological Description: An association of coarse-grained igneous rocks, mainly quartz diorites, occurring as a complex of circular to elongate, roughly overlapping intrusive bodies.
Definition of Lower Boundary: Where not in mutual contact, the intrusions are believed to have been emplaced into mudrocks of Cambrian to Ordovician (possibly Tremadoc) age, correlatives of the Stockingford Shale Group.
Definition of Upper Boundary: Where not roofed by their host rocks, the intrusions are unconformably overlain by Triassic strata or Quarternary superficial deposits.
Thickness: Vertical thickness unknown; boreholes show the complex is approximately 16km in diameter.
Geographical Limits: Forms isolated and generally quarried outcrops extending from southeast of Sapcote (SP 497 931) northwards to near Enderby (SP 998 535).
Parent Unit: Not Applicable (-)
Previous Name(s): Syenites (-1826)
Alternative Name(s): none recorded or not applicable
Stratotypes:
Reference Section  Croff Quarry 
Type Section  Stoney Cove Quarry. 
Reference(s):
Worssam, B C and Old, R A, 1988. Geology of the country around Coalville. Memoir of the British Geological Survey, Sheet 155 (England and Wales) 
Le Bas, M J. 1972. Caledonian igneous rocks beneath central and eastern England. Proceedings of the Yorkshire Geological Society, Vol. 39, 71 - 86. 
Bridge, D McC, Carney, J N, Lawley, R S and Rushton, A W A. 1998. Geology of the country around Coventry and Nuneaton. Memoir of the British Geological Survey, Sheet 169 (England and Wales). 
Hill, F and Bonney, T G. 1878. On the pre-Carboniferous rocks of the Charnwood Forest, Part II. Quarterly Journal of the Geological Society of London, Vol. 34, 199 - 239. 
Pharaoh, T C, Brewer, T S and Webb, P C. 1993. Subduction related magmatism of late Ordovician age in eastern England, Geological Magazine, Vol.130, 647 - 656. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E155 E169