The BGS Lexicon of Named Rock Units — Result Details

Unnamed Igneous Intrusion, Carboniferous to Permian

Computer Code: UIICP Preferred Map Code: notEntered
Status Code: Full
Age range: Carboniferous Period (C) — Permian Period (P)
Lithological Description: Dolerite and Tholeiitic Basalt (DBAT) - quartz micro-gabbro (dolerite), basalt, basinite, camptonite or monchiquite; locally columnar jointed; Felsic Rock (FELSR) - granite, mainly biotite granite, locally lithium-mica granite in St Austell and Godolphin intrusions, with variable development of K-feldspar megacrysts.
Definition of Lower Boundary: none recorded or not applicable
Definition of Upper Boundary: none recorded or not applicable
Thickness: Dolerite and Tholeiitic Basalt (DBAT) - Comprises 4 distinct leaves: Farne Island Sill up to about 30m; Alnwick Sill 6 to 21m; Great Whin Sill typically about 30m, locally up to 90m in Weardale and Little Whin Sill up to 13m. Felsic Rock (FELSR) - 10 to 20 km.
Geographical Limits: Dolerite and Tholeiitic Basalt (DBAT) - Whin Sill in NE England and minor intrusions in Midland Valley of Scotland; Felsic Rock (FELSR) - Granite intrusions of SW England from Scilly Isles to Dartmoor.
Parent Unit: Not Applicable (-)
Previous Name(s): none recorded or not applicable
Alternative Name(s): none recorded or not applicable
Stratotypes:
none recorded or not applicable
Reference(s):
Stone P., Millward, D., Young, B., Clarke, S.M., McCormac, M. and Lawrence, D.J.D. 2010. British Regional Geology: Northern England (fifth edition) (Keyworth, Nottingham: British Geological Survey). 
British Geological Survey. 2007. Bedrock Geology UK North. 1:625 000 scale (Keyworth, Nottingham: British Geological Survey). 
British Geological Survey. 2007. Bedrock Geology UK South. 1:625 000 scale (Keyworth, Nottingham: British Geological Survey). 
Scrivener, R C. 2006. Cornubian granites and mineralization of SW England. In: Brenchley, P J and Rawson, P F (eds.) The Geology of England and Wales. The Geological Society London, 257-267. 
1:50K maps on which the lithostratigraphical unit is found, and map code used:
S033 S034