Metamorphic rock
obsidian
METAMORPHISM.
Stress
Metamorphic rock is formed by heat and pressure making changes to igneous and sedimentary rock.
Ayer's Rock
Metamorphic rock is formed by heat and pressure making changes to igneous and sedimentary rock.
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matter
The Rock Cycle.
The heat (in the form of friction and pressure) affects the rock by performing a process called menstrual which changes the material of the rock, but not the mass.
the process must take place underground~ apex
Deformation