1·Igneous and metamorphic rocks are more compact, commonly crystalline, and rarely contain spaces between grains.
火成岩和变质岩比较致密，通常是结晶性的，颗粒之间很少有空隙。
2·Some very ancient sediments were no longer recognizable, having been converted to igneous and metamorphic rocks in the course of mountain building.
在造山的过程中，一些非常古老的沉积物已被转化为火成岩和变质岩，已经无法辨认了。
3·However, even igneous and metamorphic rocks may act as groundwater reservoirs if extensive fracturing occurs in such rocks and if the fracture system is interconnected.
然而，如果火成岩和变质岩中发生大规模的断裂，并且断裂系统相互连通，那么它们也可以作为地下水储集层。
4·The evaluating method of metamorphic rocks.
变质岩潜山储层评价方法；
5·Precambrian metamorphic rocks constituted the basin basement.
盆地的基底是前寒武系变质岩。
6·Almost all kinds of metamorphic rocks can be discovered here.
变质岩几乎所有类型的小构造，在这里都找得到。
7·What kinds of regional metamorphic rocks are present in the area?
在这一地区有哪些种类的区域变质岩?。
8·Yunnan emerald deposit was found in (pre) Cambrian metamorphic rocks.
云南祖母绿矿床产于寒武系变质岩中。
9·The first type is residuals of metamorphic rocks of high amphibolite facies.
一类为属于高角闪岩相的变质岩（残余）包体；
10·They are important structural features in the Precambrian metamorphic rocks.
它是前寒武纪变质岩内一种重要的构造现象。