Uploaded on:
16/03/2009 10:58:41
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P number: P527719
Caption: Diatomite from the Muir of Dinnet, Ballater, Aberdeenshire.
Description: A specimen of diatomite from the deposit at Muir of Dinnet near Ballater, Aberdeenshire. Diatomite is a fine-grained earth substance resembling chalk or white clay in appearance and when dry easily breaking down into a white powder. Some specimens are as light as cork and can absorb four times their weight of water. It is composed of frustules of diatoms, extremely minute siliceous organisms. British Geological Survey Petrology Collection sample number MC 7496. In about 1880 a substance referred to as 'white moss' was reported underneath the peat at Muir of Dinnet. It was recognized as a diatomaceous deposit by the Rev. George Davidson and was regarded as a substance that could replace kieselguhr in the manufacture of dynamite. Practically the whole commercial output was sent to the Ardeer explosive works in Ayrshire where the organic matter was burnt away in kilns before use as an absorbent for nitro-glycerine in the manufacture of dynamite.
Date taken: 25/06/1905
Photographer: Unknown
Copyright statement: Unknown
Orientation: Landscape
Size: 335.31 KB; 1000 x 665 pixels; 85 x 56 mm (print at 300 DPI); 265 x 176 mm (screen at 96 DPI);
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