| Computer Code: |
SKID |
Preferred Map Code: |
notEntered |
| Status Code: |
Full |
| Age range: |
Early Devonian Epoch (DL)
— Early Devonian Epoch (DL) |
| Lithological Description: |
Biotite granite and potassium feldspar-phyric biotite granite, with a zone of muscovite-quartz rock, interpreted as greisen. Radiometric age: 399 +/- 8 Ma (recalculated using later constants from Shepherd et al., 1976). |
| Definition of Lower Boundary: |
Not defined. |
| Definition of Upper Boundary: |
Not defined. |
| Thickness: |
A steep-sided cylindrical pluton, with an outcrop area less than 3 sq. km. |
| Geographical Limits: |
Grainskill Beck and the River Caldew [NY 298 300 to 326 331], and Sinen Gill [NY 229 281], Cumbria. |
| Parent Unit: |
Northern England Devonian Plutonic Suite (NEDP)
|
| Previous Name(s): |
Skiddaw Granite [Obsolete Name and Code: Use SKID]
(-3034)
|
| Alternative Name(s): |
none recorded or not applicable
|
| Stratotypes: |
| Type Area |
River Caldew, Cumbria. Loughlin (1999). |
| Reference(s): |
| Loughlin, S C, 1999. Grainsgill, Caldew valley. In Stephenson, D, Bevins, R E, Millward D, Highton, A J, Parsons I, Stone P, and Wadsworth W J. Caledonian igneous rocks of the British Isles. (Peterborough: Joint Nature Conservation Committee.) |
| Shepherd, T J, Beckinsale, R D, Rundle, C C and Durham J, 1976. Genesis of the Carrock Fell tungsten deposits, Cumbria: fluid inclusion and isotopic study. Transactions of the Institution of Mining and Metallurgy, Vol.85, B63-73. |
| 1:50K maps on which the lithostratigraphical unit is found, and map code used: |
|
E023
E029
|
