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Q: Pegmatite is an example of the____:
  • A. sedimentary rock
  • B. extrusive igneous rock
  • C. intrusive igneous rock
  • D. metamorphic rock
Correct Answer: Option C - Intrusive igneous rocks make up the majority of igneous rock and are formed from magma that cools and solidifies within the crust of a planet, surrounded by pre-existing rock; the magma cools slowly and, as a result these rocks are coarse-grained.
C. Intrusive igneous rocks make up the majority of igneous rock and are formed from magma that cools and solidifies within the crust of a planet, surrounded by pre-existing rock; the magma cools slowly and, as a result these rocks are coarse-grained.

Explanations:

Intrusive igneous rocks make up the majority of igneous rock and are formed from magma that cools and solidifies within the crust of a planet, surrounded by pre-existing rock; the magma cools slowly and, as a result these rocks are coarse-grained.