The BGS Lexicon of Named Rock Units — Result Details

Lake District Ordovician Mafic Plutonic Suite

Computer Code: LDMP Preferred Map Code: notEntered
Status Code: Full
Age range: Ordovician Period (O) — Ordovician Period (O)
Lithological Description: Gabbro, microgabbro and dolerite, with subordinate microgranite, microdiorite, rhyolite; and intrusive breccia.
Definition of Lower Boundary: Includes all mafic plutonic intrusions in the Lake District of proved and inferred Ordovician age which includes the Carrock Fell Complex (CFCO) and the Haweswater Intrusions (HAWS).
Definition of Upper Boundary: Not defined.
Thickness: Not defined.
Geographical Limits: Within the Lake District Lower Palaeozoic inlier in Cumbria.
Parent Unit: Caledonian Supersuite (CIGSS)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
none recorded or not applicable
Reference(s):
Hunter, R H, 1980. The petrology and geochemistry of the Carrock Fell Gabbro-granophyre Complex, Cumbria. (University of Durham: PhD thesis.) 
Millward, D. 2002. Early Palaeozoic magmatism in the English Lake District. Proceedings of the Yorkshire Geological Society, Vol. 54, Part 2, 65-93. 
Millward, D and Beddoe-Stephens, B, 1998. The Haweswater intrusions. British Geological Survey Technical Report WA/98/60. 
Stephenson, D, Bevins, R E, Millward, D, Highton, A J, Parsons, I, Stone, P and Wadsworth, W J, 1999. Caledonian igneous rocks of the British Isles. (Peterborough: Joint Nature Conservation Committee.) 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
E023 E030