http://earthwise.bgs.ac.uk/index.php?action=history&feed=atom&title=File%3AP519657.jpg 2026-04-03T15:53:24Z Revision history for this page on the wiki MediaWiki 1.42.3 http://earthwise.bgs.ac.uk/index.php?title=File:P519657.jpg&diff=31785&oldid=prev 2017-07-29T15:22:09Z

<p>User created page with UploadWizard</p> <p><b>New page</b></p><div>=={{int:filedesc}}==<br /> {{Information<br /> |description={{|1=Specimen of slate from top of cliff where slate has been quarried, Collie Head, Troup Head, Gardenstown, Aberdeenshire, Scotland. Dark blue-grey coloured slate with reflective cleavage stained by secondary iron oxides. The specimen is of Precambrian, Dalradian age. British Geological Survey Petrology Collection sample number EMC 4154. For hundreds of years slate was the preferred roofing material in Scotland. The geological variation found in slate quarries from across Scotland meant that each produced a characteristic slate, with a colour, texture and thickness varying from region to region. Slates can be produced in a vast range of shapes and sizes. At its peak in the late 1800s the slate industry in Scotland produced some 45,000 tons annually. There has been no slate production in Scotland for nearly 50 years. Specimen size: 12x9cm. P519657.}}<br /> |date=2017-07-29 16:00:00<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