Most metamorphic rocks show a layering called foliation which results from the parallel alignment of mineral grains. a few metamorphic rocks do not possess foliation.

 
  • 大多數變質(zhì)巖都具有一種稱(chēng)之為面理的層,面理是由巖石中礦物的平行定向排列而顯示,只有少數變質(zhì)巖不具有面理構造。
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