Computer Code: |
NEDP |
Preferred Map Code: |
notEntered |
Status Code: |
Full |
Age range: |
Devonian Period (D)
— Devonian Period (D) |
Lithological Description: |
A potassium feldspar-phyric granite, biotite granite and muscovite-quartz rock, interpreted as greisen. |
Definition of Lower Boundary: |
Includes all granite plutonic intrusions of Early Devonian age in Northern England, including the exposed Shap Pluton (SHAP), the Skiddaw Pluton (SKID) and the concealed Weardale and Crummock Water intrusions. The Shap Pluton is the type pluton for this Suite. |
Definition of Upper Boundary: |
Not defined. |
Thickness: |
Not defined. |
Geographical Limits: |
Cumbria, Northumberland and Durham, northern England. |
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): |
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.) |
Millward, D. 2002. Early Palaeozoic magmatism in the English Lake District. Proceedings of the Yorkshire Geological Society, Vol. 54, Part 2, 65-93. |
1:50K maps on which the lithostratigraphical unit is found, and map code used: |
E023
E029
E039
E030
|