S16. Limestone - Ooidal grainstone
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Fact sheet
Description: 

This carbonate-rich metaperidotite is included to illustrate that serpentinite is not the only low-grade product from peridotite.  Talc looks like a felted mass of fine-grained muscovite flakes, but with even higher birefringence.  The carbonate is magnesite (MgCO3) with some blocky grains (rhombs) of dolomite. Opaques are magnetite.

 

In Place
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Timescale: 
Jurassic
Ma = Millions of years ago
In Focus
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Type: 
sedimentary
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