http://earthwise.bgs.ac.uk/index.php?action=history&feed=atom&title=File%3AP527620.jpg 2026-04-03T23:10:18Z Revision history for this page on the wiki MediaWiki 1.42.3 http://earthwise.bgs.ac.uk/index.php?title=File:P527620.jpg&diff=31973&oldid=prev 2017-08-02T18:04:48Z

<p>User created page with UploadWizard</p> <p><b>New page</b></p><div>=={{int:filedesc}}==<br /> {{Information<br /> |description={{|1=This specimen shows a muscovite-biotite intergrowth from the Carn Gorm mica prospect, near Garve, Rossshire. British Geological Survey Petrology Collection sample number MC 7400. Both biotite and muscovite are common in the pegmatite along with quartz and subordinate white feldspar. Biotite at this deposit can occur in books up to fifteen inches in diameter while the muscovite occurs up to eight inches in diameter. The deposit was noted as a source of ruby type muscovite of good clarity and quality however the intergrowths of biotite and muscovite were regarded as a flaw. The mica prospect was investigated during the Second World War, c. 1943. The main source of mica in Scotland at this time was from Knoydart. P527620.}}<br /> |date=2017-08-02 19:01:14<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>

Scotfot