obsidian
Metamorphic rock
METAMORPHISM.
Stress
Metamorphic rock is formed by heat and pressure making changes to igneous and sedimentary rock.
Metamorphic rock is formed by heat and pressure making changes to igneous and sedimentary rock.
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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 Rock Cycle.
matter
Lava
The process by which the shape of a rock changes in response to stress is called deformation. This can result in folding, faulting, or fracturing of the rock.
The changes to the rock must occur in solid form.