| P number: | P528067 |
|---|---|
| Caption: | Map showing the British localities of diatomite. |
| Description: | Map showing the British localities of diatomite. Diatomite is a whitish, fine-grained substance consisting essentially of the siliceous skeletons or frustules of diatoms, non-cellular free-living organisms which float in the surface waters of the sea and freshwater lakes and are classified under the plants. The chief locations are in the Trotternish peninsula on Skye, Muir of Dinnet in Aberdeenshire, Kentmere in the English Lake District and Toombridge in the Bann Valley in Northern Ireland. Minor occurrences include North Tolsta in Lewis, near Loch Ba on Mull, in the alluvial area facing the Bay of Laig on Eigg, north of Uyeasound on Unst in the Shetlands, Lynn Arenig Bach 8 miles north-west of Bala and near Dolgelly. Commercial uses include use as a filtering medium for which its high porosity and chemical inertness render it especially valuable and as an insulator against heat, cold and sound. It also has uses as an absorbent, as a catalyst, as a lightweight filler, as a mild abrasive in many domestic metal polishes, as lightweight building blocks, partitions and roofing tiles and some grades were used for bleaching in a similar manner to fuller's earth. |
| Date taken: | 25/06/1905 |
| Photographer: | Unknown |
| Copyright statement: | Unknown |
| Orientation: | Portrait |
| Size: | 104.89 KB; 693 x 1000 pixels; 59 x 85 mm (print at 300 DPI); 183 x 265 mm (screen at 96 DPI); |
| Average Rating: | Not yet rated |
| Categories: | Unsorted Images |
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