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P000941

Uploaded on:
13/02/2009 09:21:54
Type:
Digital Asset
File Size:
348.09 KB
Dimensions:
779 x 1000 pixels
2771 views 5 downloads
P number: P000941
Old photograph number: D02746
Caption: Fairy Castle at junction of Bladdering Cleuch and Back Water. East Lothian. Vertical dolerite dyke intruded into Lower Old Red Sandstone (Lower Devonian) conglomerate.
Description: Fairy Castle at junction of Bladdering Cleuch and Back Water. East Lothian. Vertical dolerite dyke intruded into Lower Old Red Sandstone (Lower Devonian) conglomerate. The dyke, one of a swarm of olivine-basalt or olivine-dolerite dykes that cuts the Lower Devonian Great Conglomerate is thought to be Middle Devonian or even Carboniferous age. The greywacke clasts are cut sharply across, and the baking of the immediately adjacent conglomerate often forms clean-sided trenches resulting from the weathering of the less resistant dyke rock. The dykes in the swarm are generally less than 1 m. thick, but range up to 5 m. Most are vertical and all are characterized by sharp, clean junctions with the country rock. The trend of these dykes varies in an arc from 270 to 325 degrees with a dominant trend of 300-305 degrees.
Date taken: 01/01/1978
Photographer: Bennett, A.
Copyright statement: NERC
Acknowledgment: This image was digitized with grant-in-aid from SCRAN the Scottish Cultural Resources Access Network
X longitude/easting: 370210
Y latitude/northing: 669980
Coordinate reference system, ESPG code: 27700 (OSGB 1936 / British National Grid)
Orientation: Portrait
Size: 348.09 KB; 779 x 1000 pixels; 66 x 85 mm (print at 300 DPI); 206 x 265 mm (screen at 96 DPI);
Average Rating: Not yet rated
Categories: Best of BGS Images/ Geological structures, Geoscience subjects/ Igneous features/ Dykes  

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