It should be noted that Metamorphism associated with volcanic arcs moves from the zeolite facies into the greenschist facies, then the rock passes through the amphibolite facies and into the granulite facies.
Metamorphism can be regarded as the process of mineral assemblage as well as texture variation.
This usually occur as a results of physical-chemical changes of solid rocks, through crust movement and magma activity,
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