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P001721

Uploaded on:
14/02/2009 01:44:57
Type:
Digital Asset
File Size:
252.08 KB
Dimensions:
764 x 1000 pixels
1608 views 4 downloads
P number: P001721
Old photograph number: B00248
Caption: Porta Leacach, south-east coast of Arran, Buteshire. Tertiary basalt dyke (0.6 m. broad) cutting Triassic sandstones.
Description: Porta Leacach, south-east coast of Arran, Buteshire. Tertiary basalt dyke (0.6 m. broad) cutting Triassic sandstones. Pale, subhorizontally-bedded sandstone dips gently seaward. Joints are spaced c. 2 metres apart. The dyke (dark) is relatively fine-grained, because it is narrow, and therefore cooled quickly. Here its hardness is compensated by its relatively close (0.15 m.) jointing, and it does not stand proud of the sandstone. Most of the large loose blocks are dolerite, either from dykes or from the Dippin sill.
Date taken: 01/01/1897
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: 204200
Y latitude/northing: 621400
Coordinate reference system, ESPG code: 27700 (OSGB 1936 / British National Grid)
Orientation: Portrait
Size: 252.08 KB; 764 x 1000 pixels; 65 x 85 mm (print at 300 DPI); 202 x 265 mm (screen at 96 DPI);
Average Rating: Not yet rated
Categories: Unsorted Images, Geoscience subjects/ Igneous features/ Dykes  

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