P527914

Uploaded on:
17/03/2009 05:39:26
Type:
Digital Asset
File Size:
185.01 KB
Dimensions:
1000 x 783 pixels
3945 views 4 downloads
P number: P527914
Caption: Plumbonacrite on galena, North Glencrieff, Wanlockhead, Dumfriesshire.
Description: A specimen of plumbonacrite on galena from the 40 fathoms level, North Glencrieff, Wanlockhead, Dumfriesshire. Galena is a primary ore of lead and plumbonacrite is a variety of hydrocerussite, a hydrated carbonate of lead, one of the secondary accessory ores of lead. British Geological Survey Petrology Collection sample number MC 7690. Plumbonacrite is the name given to those varieties of hydrocerussite that have a nacreous lustre. Secondary accessory ores are formed by the oxidation of the primary ores. They are usually restricted to the upper portions of the veins, though in the New Glencrieff Vein they extend to about 200 fathoms from the surface (120 fathoms below adit level).
Date taken: 25/06/1905
Photographer: Unknown
Copyright statement: Unknown
Orientation: Landscape
Size: 185.01 KB; 1000 x 783 pixels; 85 x 66 mm (print at 300 DPI); 265 x 207 mm (screen at 96 DPI);
Average Rating: Not yet rated
Categories: Best of BGS Images/ Rocks and minerals  

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