http://earthwise.bgs.ac.uk/index.php?action=history&feed=atom&title=File%3AP527606.jpg 2026-04-03T19:50:53Z Revision history for this page on the wiki MediaWiki 1.42.3 http://earthwise.bgs.ac.uk/index.php?title=File:P527606.jpg&diff=31964&oldid=prev 2017-08-02T18:04:35Z

<p>User created page with UploadWizard</p> <p><b>New page</b></p><div>=={{int:filedesc}}==<br /> {{Information<br /> |description={{|1=A specimen of muscovite mica from the Braetollie A deposit, five miles north 30 degrees west of Alness, Rossshire and at an altitude of 1000 feet. British Geological Survey Petrology Collection sample number MC 7386. Trial workings were undertaken at Braetollie A in 1943. The mica was found to occur in thin lenticular bodies in a pelitic band in the dominantly psammitic schists of the area. The mica, as seen in the field was of a clear ruby colour. The&#039;books&#039;in general were flat.&#039;Ruling&#039;and&#039;A-structure&#039;were present only to a small extent. Some&#039;books&#039;in the field contained inclusions of tourmaline, magnetite and garnet but the amount of flawed material was quite small. Most&#039;books&#039;were four to eight inches in diameter but ten-inch crystals were fairly numerous. P527606.}}<br /> |date=2017-08-02 19:01:07<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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