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P002227

Uploaded on:
14/02/2009 03:02:00
Type:
Digital Asset
File Size:
178.63 KB
Dimensions:
1001 x 719 pixels
1446 views 4 downloads
P number: P002227
Old photograph number: C02012
Caption: Quinag, 8.9 km. north-west of Inchnadamph, looking west, Sutherland. A mountain of Torridonian sandstone capped by Cambrian Basal Quartzite and resting on an uneven surface of Lewisian gneiss.
Description: Quinag, 8.9 km. north-west of Inchnadamph, looking west, Sutherland. A mountain of Torridonian sandstone capped by Cambrian Basal Quartzite and resting on an uneven surface of Lewisian gneiss. In late Precambrian times c. 1000-750 Ma. the eroded land surface of Lewisian gneiss of the North-West Highlands was covered by a thick accumulation of sediments which in the Caledonian Foreland have never been deformed or regionally metamorphosed. These Torridonian rocks are part of those thick accumulations. It might be that they are only the last of several cycles of deposition and erosion since the gneisses formed the land surface. The Torridonian was deposited on an undulating surface and in the region of Quinag it had high relief, the Torridonian - Lewisian boundary is a major unconformity. The overlying Cambrian quartize is in turn unconformable on the Torridonian.
Date taken: 01/01/1914
Photographer: Lunn, R.
Copyright statement: Crown
Acknowledgment: This image was digitized with grant-in-aid from SCRAN the Scottish Cultural Resources Access Network
X longitude/easting: 220500
Y latitude/northing: 928500
Coordinate reference system, ESPG code: 27700 (OSGB 1936 / British National Grid)
Orientation: Landscape
Size: 178.63 KB; 1001 x 719 pixels; 85 x 61 mm (print at 300 DPI); 265 x 190 mm (screen at 96 DPI);
Average Rating: Not yet rated
Categories: Unsorted Images, Geoscience subjects/ Stratigraphical  

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