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P002201

Uploaded on:
14/02/2009 02:58:14
Type:
Digital Asset
File Size:
293.47 KB
Dimensions:
1000 x 725 pixels
1472 views 4 downloads
P number: P002201
Old photograph number: C01967
Caption: 3.2 km. south of Portgower, 3.2 km. south-west of Helmsdale, Sutherland. The Jurassic Helmsdale Boulder Bed. Jurassic boulder bed made up of large blocks of Middle Old Red Sandstone lying at all angles. A geologist can be seen standing on the rocks.
Description: 3.2 km. south of Portgower, 3.2 km. south-west of Helmsdale, Sutherland. The Jurassic Helmsdale Boulder Bed. Jurassic boulder bed made up of large blocks of Middle Old Red Sandstone lying at all angles. A geologist can be seen standing on the rocks. These spectacular rocks, specifically of Kimmeridgian age, were formed in the Jurassic seas and controlled by the then active Helmsdale Fault. The fault created a submarine scarp thought to be at least c. 30 m. high with a deep water submarine slope environment to the south-east of the fault and a shallow water shelf environment on the north-west side, the rocks of the scarp being gently dipping Middle Old Red Sandstone breccias. Derived from the top of the scarp and flowing down gullies, large accumulations of rock-fall-breccias formed at the foot of a submarine escarpment to create what is now the boulder bed.
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: 300500
Y latitude/northing: 913500
Coordinate reference system, ESPG code: 27700 (OSGB 1936 / British National Grid)
Orientation: Landscape
Size: 293.47 KB; 1000 x 725 pixels; 85 x 61 mm (print at 300 DPI); 265 x 192 mm (screen at 96 DPI);
Average Rating: Not yet rated
Categories: Unsorted Images, Geoscience subjects/ Stratigraphical  

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