三个变质作用阶段的特征是：前榴辉相阶段为中压相系绿帘角闪岩相；
The characteristics of three metamorphic stages are as follows: before the eclogite-facies stage which is middle-pressure epidote amphibolite facies;
不考虑UI集成阶段，我们看到的顺序与场景2相同。
Beyond the UI Integration phase we see the same sequence as in scenario 2.
两组岩石群所含有的碳酸盐十分相近，而这一点对于研究来说十分关键，因为皮尔巴拉地区的岩石被用于研究35亿年前地球早期阶段的生命。
The similarities between the two sets of rocks in terms of carbonates is important because Pilbara is used to study the early stages of life on Earth 3.5 billion years ago.
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