Concept explainers
The characteristics of regional metamorphism include
(a) deformed rock layers.
(b) distinctly foliated rocks.
(c) zoned sequences of minerals.
(d) All of these.
The correct option for the statement “The characteristics of regional metamorphism include”
Answer to Problem 7RAT
The correct option for the statement “The characteristics of regional metamorphism include” is option (a).
Explanation of Solution
The two processes that change the rock during metamorphism are contact and regional metamorphism. Regional metamorphism occurs under the action of heat and pressure over the entire area of rock. Deformed rock layers are formed by regional metamorphism.
In this process, the whole region of the rock is affected by heat and pressure. Whereas in contact metamorphism, a zone of alteration is formed which surrounds the encroachment.
Conclusion:
Therefore, the correct option for the statement “The characteristics of regional metamorphism include” is option (a).
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