Which one of the following statements about metamorphic rocks is <strong>NOT</strong> correct?

  1. A. Due to segregation of minerals into wavy bands or platy surfaces, some metamorphic rocks develop foliations.
  2. B. Where the foliations develop into broad mineral bands, the metamorphic rock is extremely hard.
  3. C. Where the foliations are moderately thin, the metamorphic rock tends to flake apart.
  4. D. Rocks that originally were composed of one dominant mineral are often foliated by metamorphism.

Correct Answer: D. Rocks that originally were composed of one dominant mineral are often foliated by metamorphism.

Explanation

Metamorphic rocks composed of a single dominant mineral, such as quartzite or marble, generally do not show foliation because they lack the platy or elongated minerals required to form it.

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