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The boyndie syncline, a D1 structure in the Dalradian of Scotland

✍ Scribed by J. E. Treagus; J. L. Roberts


Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
797 KB
Volume
16
Category
Article
ISSN
0072-1050

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✦ Synopsis


The structure of the Dalradian rocks of the Banffshire coast has been re-examined. It is shown that D, structures face upwards along the entire section and the major Boyndie Syncline (Sutton and Watson 1956) must also be of D, age and not D, as proposed by Johnson (1962). D, structures are developed in the west, most strongly in the Portsoy Group and Cowhythe Gneiss where they may be related to the Portsoy Thrust (Elles 1931). East of the Cowhythe Gneiss D, structures are not developed but D, structures are of local importance. Porphyroblast growth is considered to be post-D,, pre-D, related to the 'active' D, deformation in the west (Barrovian) and to the 'static' D, interval in the east (Buchan). The wider implications of these conclusions for Dalradian structure are briefly considered.


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