Concept explainers
What is metamorphism? What causes it?
Metamorphism and its causes.
Answer to Problem 19RQ
The transformation of rock due to change in physical and chemical states is known as metamorphism. It occurs under the action of heat and pressure over the entire area of a rock.
Explanation of Solution
The change in rock can take place by two metamorphism, which are contact and regional metamorphism. When a rock structure is encroached by magma, contact metamorphism takes place. A zone of alteration is created by the high temperature of the magma, which surrounds the encroachment. It occurs mostly because of chemical reaction or activity and less dependent on mechanical deformation. Another process of rock alteration is regional metamorphism. It occurs under the action of heat and pressure over the entire area of rock.
Conclusion:
Therefore, transformation of rock due to change in physical and chemical states is known as metamorphism. It occurs under the action of heat and pressure over the entire area of a rock.
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