Computer Code: |
COFG |
Preferred Map Code: |
COFG |
Status Code: |
Full |
Age range: |
Emsian Age (DE)
— Emsian Age (DE) |
Lithological Description: |
The pluton is compositionally zoned comprising a marginal coarse-grained feldspar-phyric granite enclosing a central fine- to medium-grained aphyric granite. The outer zone has been divided into a marginal biotite-granite and an inner biotite-muscovite-granite. |
Definition of Lower Boundary: |
Intrusive margin of the pluton against surrounding contact metamorphosed rock. |
Definition of Upper Boundary: |
Not applicable. |
Thickness: |
Geophysical studies indicate that it extends to a depth of 10 - 12km. (Parslow, 1968; Parslow and Randall, 1973). |
Geographical Limits: |
The pluton is exposed in south-west Scotland. It extends from Cairnsmore [NX 49 65] in the south-west to New Galloway [NX 62 76] in the north-east. |
Parent Unit: |
Galloway Granitic Suite (GALGR)
|
Previous Name(s): |
Cairnsmore of Fleet Granite [Obsolete Name and Code: Use COFG]
(-3949)
|
Alternative Name(s): |
none recorded or not applicable
|
Stratotypes: |
Type Area |
The inner zone of fine-grained aphyric granite is exposed to the north of Loch Fleet. |
Type Area |
The outer zone of coarse-grained granite is exposed in the vicinity of Cairnsmore of Fleet. |
Reference(s): |
Parslow, G R. 1968. The physical and structural features of the Cairnsmore of Fleet Granite and its environs. Scottish Journal of Geology, Vol. 4, p. 91 - 108. |
Parslow, G R. 1971. Variations in mineralogy and major elements in the Cairnsmore of Fleet Granite, SW Scotland. Lithos, Vol. 9, p. 43 - 55. |
Parslow, G R and Randall, B A. 1973. A gravity survey of the Cairnsmore of Fleet Granite and its environs. Scottish Journal of Geology, Vol. 9, p. a 219 - 231. |
Barnes, R P. 2008. The geology of the Whithorn, Kirkcowan and Wigtown district. Memoir of the British Geological Survey, Sheets 4W, 4E and 2 (Scotland). |
Gardiner, C L and Reynolds, S H. 1937. The Cairnsmore of Fleet Granite and its metamorphic aureole. Geological Magazine, Vol. 74, p. 289 - 300. |
Cook, D R. 1976. The geology of the Cairnsmore of Fleet Granite and its environs, south-west Scotland. Unpublished PhD thesis, University of St. Andrews. |
Fettes, D J and Timmerman, H. 1993. The geology of the Cairnsmore of Fleet Granite. British Geological Survey Technical Report, WA/92/89. |
1:50K maps on which the lithostratigraphical unit is found, and map code used: |
S004
S005
S008
S009
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