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It must undergo heat and pressure. Different amounts for different rocks.

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Q: What must happen for an existing rock to become a metamorphic rock?
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Related questions

What must happen to a rock for it to become a metamorphic rock?

It must melt.


What processes must a sedimentary rock go through to become a metamorphic rock?

what processes must sedimentary rock go through to become a metamorphic rock


What process must a sedimentary rock go through to become a metamorphic rock?

what processes must sedimentary rock go through to become a metamorphic rock


In order to form magma what must happen to sedimentary metamorphic or igneous rocks?

Heat must melt the sedimentary,metamorphic,or igneous and it will turn to magma


What must happen to an igneous rock before it can become a sedimentary or metamorphic rock?

To become a sedimentary rock, an igneous rock must first be weathered, and then eroded, and then deposited as a sediment, and then consolidated (e.g. by cementation or pressure welding of grains.) To become a metamorphic rock it must be transformed by heat and pressure, which it can do directly (e.g. granite turning into gneiss) or after first turning into a sedimentary rock.


What process must sedimentary rocks undergo to become metamorphic?

Metamorphism


What are three processes that a metamorphic must experience before it can become a sedimentary rock?

ErosionDepositionBurial and Cementing


Sedimentary rock becomes metamorphic rock after millions of years True or False?

It must be false, because the statement in question is not valid all the time. Sedimentary rock might become metamorphic rock after millions of years, but it might take less time, more time, or not happen at all.


What are three processes that a metamorphic rock must experience before it can become a sedimentary rock?

ErosionDepositionBurial and Cementing


What are three processes that a metamorphic rock must experience before it can become sedimentary rock?

ErosionDepositionBurial and Cementing


What are three processes that metamorphic rock must experience before it can become a sedimentary rock?

ErosionDepositionBurial and Cementing


What are three process that a metamorphic rock must experience before it can become a sedimentary rock?

ErosionDepositionBurial and Cementing