📢 Too many exams? Don’t know which one suits you best? Book Your Free Expert 👉 call Now!

  • google app store apple app store
  • ✖

      Question

      The dark color of igneous rocks is usually caused

      by:
      A Quartz Correct Answer Incorrect Answer
      B Feldspar Correct Answer Incorrect Answer
      C Calcite Correct Answer Incorrect Answer
      D Ferromagnesian minerals Correct Answer Incorrect Answer

      Solution

      Minerals containing high amounts of Iron (Ferrum) and Magnesium, such as pyroxene and olivine, are naturally dark. These minerals dominate "mafic" rocks like basalt, giving them a black or dark green color.

      Practice Next
      ask-question