6 NEW YORK STATE MUSEUM 



COMMON MINERALS FOUND IN CRYSTALLINE LIMESTONES 



graphite dolomite garnet 



sphalerite siderite titanite 



pyrite pyroxene tourmalin 



marcasite wollastonite chrysolite 



quartz amphibole humite group 



corundum wernerite muscovite 



spinel , vesuvianite phlogopite 



rutile zircon clinochlore 



brucite danburite talc 



calcite epidote apatite 



Crystalline schists. A characteristic series of minerals, for the 

 most part silicates, is found in micaceous, hornblendic and argil- 

 laceous schists. They occur embedded and disseminated through 

 the mass of the rock and reach their highest development along 

 the contact portion of the rock mass. 



COMMON MINERALS FOUND IN CRYSTALLINE SCHISTS 



quartz cyanite biotite 



chrysoberyl andalusite iolite 



amphibole sillimanite tourmalin 



garnet staurolite beryl 



zircon muscovite 



Serpentines and talc. The minerals occurring in serpentine are 

 in some cases the unaltered species from which the serpentine was 

 derived, in other cases secondary minerals resulting from a fur- 

 ther alteration of the serpentine. They occur embedded and in 

 veins of various thickness traversing the serpentine masses. 



COMMON MINERALS FOUND IN SERPENTINE AND TALC 



quartz (chalcedony) magnesite garnet 



spinel enstatite clinochlore 



chromite pyroxene talc 



brucite amphibole deweylite 



dolomite chrysolite apatite 



calcite 



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