Brucite marble - Isle of Skye
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Fact sheet
Description: 

This sample of marble formed by contact metamorphism of limestone by the Paleocene age Beinn An Dubhaich Granite (Skye Eastern Red Hills Centre) on the Isle of Skye. The original sedimentary limestone was part of the Durness Limestone group, which was deposited in the Cambrian period.

The thin section is dominated by dusty Mg-rich carbonate grains with many deformation bands. There are also many circular bundles of white brucite crystals which appear as single zoned grains but between crossed polars they are revealed to be many brucite fibres in each grain. High relief pink coloured garnet is evident in the upper left area of the section, and is isotropic between crossed polars. Large areas of pale olivine are strongly cracked and appear to be broken into many small sub-grains showing bright second order birefringence colours which can be distigushed from the higher order orange and green of the carbonate.

In Place
In Time
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Location description: 
Above the Old Manse, Loch Kilchrist, Isle of Skye, Scotland
Accuracy:
Location precision: 
Moderate
Timescale:
Not known
Ma = Millions of years ago
In Focus
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Type: 
metamorphic
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