Multiple choice

Which of the following is NOT a metamorphic rock?

  1. Shale

  2. Slate

  3. Gneiss

  4. Marble
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A Correct answer
Explanation

Shale is a fine-grained sedimentary rock formed from the compaction of silt and clay mineral particles. When subjected to heat and pressure, shale can metamorphose into slate, gneiss, or other metamorphic rocks. Marble is also metamorphic, formed from limestone.

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