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प्रश्न
What are metamorphic rocks?
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उत्तर
Metamorphic rocks are those rocks that are formed by the metamorphism of pre-existing rocks due to high temperature or pressure or both. Igneous and sedimentary rocks completely change over long periods of time because of movements in the earth’s crust and volcanic or mountain-building activity.
The transformation of rocks due to high temperature is called thermal metamorphism. Alteration of parent rock due to the pressure exerted on rocks from the earth’s movements is called dynamic metamorphism.
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संबंधित प्रश्न
Fill in the blank
Sedimentary rocks such as limestone change into ___________.
Classify the following rocks by selecting the correct option given below:
marble
Explain this term associated with rocks: Metamorphism
What is metamorphism?
What is meant by the term ‘metamorphism’?
Classify the following rock: Clay
Give one example of an area of: Igneous rocks
Give reasons for the following
Silicates are the most common rock forming minerals.
What are metamorphic rocks?
Match the following.
| A. | Basalt | 1. | Anthracite |
| B. | Limestone | 2. | Extrusive igneous |
| C. | Coal | 3. | Metamorphic rock |
| D. | Gneiss | 4. | Sedimentary rock |
