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Uploaded on:
21/02/2009 01:41:49
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660.11 KB
1000 x 669 pixels
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P number: P221171
Old photograph number: D06147
Caption: Deformation till at Braehead of Walkerhill, Banffshire.
Description: A red deformation till largely comprising rock fragments ripped from the underlying Devonian Gardenstown Conglomerate Formation at a roadside quarry at Braehead of Walkerhill. Unlike tills in this area containing rounded clasts, especially of Dalradian metamorphic rocks, this till appears to be transported weathered head of local rock with many angular sandstone fragments. Note also goethitic?? weathered levels. Till, or boulder clay is a glacial deposit deposited by ice sheets. It is usually unsorted, unstratified and unconsolidated. It contains a heterogeneous mixture of clay, sand, gravel and boulders of different sizes and shapes. Deformation tills form at proglacial and glacial margins by deformation processes.
Date taken: 01/09/1996
Photographer: McTaggart, F.I.
Copyright statement: NERC
X longitude/easting: 378750
Y latitude/northing: 857950
Coordinate reference system, ESPG code: 27700 (OSGB 1936 / British National Grid)
Orientation: Landscape
Size: 660.11 KB; 1000 x 669 pixels; 85 x 57 mm (print at 300 DPI); 265 x 177 mm (screen at 96 DPI);
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