Question

what are the causes for metamorphism?

Answer 1

Answer:

Combination of pressure and heat changes the form of Igneous and Sedimentary rocks without melting deep inside the Earth. This change is known as metamorphism. The rocks so - formed are known as metamorphic rocks. Slate, gneiss and quartizites are best examples of metamorphic rocks.

Explanation:

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Answer 2

Answer:

The main factors that control metamorphic processes are:

• The mineral composition of the parent rock
• The temperature at which metamorphism takes place
• The amount and type of pressure during metamorphism
• The types of fluids (mostly water) that are present during metamorphism
• The amount of time available for metamorphism