| 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. (Keyworth, Nottingham: British Geological Survey.) |
| British Geological Survey. 2007. Bedrock Geology UK South. 1:625 000. (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
|
