schistosity

/ʃɪˈstɑsəti/
noun
  1. The property of a rock that allows it to split easily into thin, parallel layers, typical of schist.
    • The schistosity of the rock made it ideal for use as roofing tiles.
    • The sample showed strong schistosity, with clear bands of mica and quartz.
    • Geologists studied the schistosity to understand how the mountain formed.
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