http://earthwise.bgs.ac.uk/index.php?action=history&feed=atom&title=File%3AP000157.jpg 2026-04-03T19:50:34Z Revision history for this page on the wiki MediaWiki 1.42.3 http://earthwise.bgs.ac.uk/index.php?title=File:P000157.jpg&diff=31940&oldid=prev 2017-08-02T17:59:58Z

<p>User created page with UploadWizard</p> <p><b>New page</b></p><div>=={{int:filedesc}}==<br /> {{Information<br /> |description={{|1=Sgurr Coire nan Gobhar, Loch Nevis, Knoydart. Inverness-shire. Opencast mica workings. Samples of mica books after rough dressing (rough cobbed) as sent for processing at the Pitlochry Depot. (Note 0.15 m. scale at base.)Sgurr Coire nan Gobhar, Loch Nevis, Knoydart. Inverness-shire. Opencast mica workings. Samples of mica books after rough dressing (rough cobbed) as sent for processing at the Pitlochry Depot. (Note 0.15 m. scale at base.) A photograph clearly illustrating the nature of the muscovite mica. Mica was used in industry in two forms; in a finely divided or pulverized form called&#039;ground mica&#039;produced from mine waste or shop scrap, or sheet mica as in the photograph. The proportion of usable mica extracted is small, up to two per cent of the total rock excavated. A further 65-90 per cent is lost due to natural imperfections and damage to the&#039;books&#039;during extraction. P000157.}}<br /> |date=2017-08-02 18:58:55<br /> |source=British Geological Survey<br /> |author=British Geological Survey<br /> |permission=<br /> |other versions=<br /> }}<br /> <br /> =={{int:license-header}}==<br /> {{subst:Custom license marker added by UW}}<br /> {{BGS}}<br /> <br /> [[Category:Uploaded with UploadWizard]]</div>

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