长石石英云母片岩与副片麻岩一起构成了古老的表壳结构。
The quartz-mica schist together with paragneiss constituted the old supracrustal series.
这个石头实际上相当稀罕和难于切割，因此在许多情形里其它类型岩石被当作代用品使用，例如绿长石，玄武岩和蛇纹石。
This stone is actually quite rare and difficult to cut, so in many cases other types of rock were used as substitutes, for example green feldspar, basalt, and serpentine.
在穆斯科克斯杂岩体中，铬铁矿矿层仅产于长石质橄榄岩中。
The chromite deposits in the muskox complex occur only in feldspathic peridotite .
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