A

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Q. Which out of the following is regarded as the chief rock types of the Pre-Cambrian Era ?

  • (A) Shale
  • (B) Light limestone
  • (C) Granite and Gneiss
  • (D) Both (A) and (B)
  • Correct Answer - Option(C)
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Explanation by: Admin

The Pre-Cambrian Era is known for very old and hard rocks.

  • The chief rock types from this era are igneous and metamorphic rocks, mainly granite and gneiss.
  • Shale and limestone are sedimentary rocks and are not characteristic of the Pre-Cambrian.

Hence, option (C) Granite and Gneiss is correct.

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