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Q: Rocks formed by the alteration of existing rocks due to heat from igneous intrusions or pressure due to crustal movement are known as :
  • A. Metamorphic rocks
  • B. Sedimentary rocks
  • C. Igneous rocks
  • D. Magma rocks
Correct Answer: Option A - Metamorphic rocks– Metamorphic rocks are formed igneous or sedimentary rocks as a result of the action of the earth movement, temperature changes, liquid pressure etc. Exp.– Marble, Gneiss, quartzite, slate, schist, serpentine etc.
A. Metamorphic rocks– Metamorphic rocks are formed igneous or sedimentary rocks as a result of the action of the earth movement, temperature changes, liquid pressure etc. Exp.– Marble, Gneiss, quartzite, slate, schist, serpentine etc.

Explanations:

Metamorphic rocks– Metamorphic rocks are formed igneous or sedimentary rocks as a result of the action of the earth movement, temperature changes, liquid pressure etc. Exp.– Marble, Gneiss, quartzite, slate, schist, serpentine etc.