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Uploaded on:
14/02/2009 03:59:55
Digital Asset
File Size:
245.61 KB
1000 x 756 pixels
1649 views 4 downloads
P number: P002621
Old photograph number: D00273
Caption: Calder's Head, North Roe, North Mainland, Shetland Isles.
Description: The Precambrian gneisses in the north-west part of North Roe are cut by numerous north-south trending dykes of basalt and felsite associated with the Northmaven Plutonic Complex. The dyke seen in the photograph is dark-coloured and probably basaltic. It dips steeply to the east (right), sub-parallel to the foliation in the adjoining gneiss. It is thought that the dykes are of late Caledonian and possibly Upper Devonian age. Dykes in gneiss. The dykes are generally composite and are part of swarms of sub-parallel roughly north-south trending acid, intermediate and basic dykes that cut the plutonic complexes and surrounding metamorphic and sedimentary rocks.
Date taken: 01/01/1961
Photographer: Fisher, W.D.
Copyright statement: Crown
Acknowledgment: This image was digitized with grant-in-aid from SCRAN the Scottish Cultural Resources Access Network
X longitude/easting: 434500
Y latitude/northing: 1191500
Coordinate reference system, ESPG code: 27700 (OSGB 1936 / British National Grid)
Orientation: Landscape
Size: 245.61 KB; 1000 x 756 pixels; 85 x 64 mm (print at 300 DPI); 265 x 200 mm (screen at 96 DPI);
Average Rating: Not yet rated
Categories: Unsorted Images, Geoscience subjects/ Igneous features/ Dykes  


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