Non-foliated metamorphic rocks are formed when rocks are heated but not deformed.
- Some rocks like limestone, marble, calcite, and quartz are the examples of non-foliated metamorphic rocks.
- These are produced when the old rocks are heated under the pressure of sediment rather than deformation this causes the change in mineral composition of the rock.
Hence, non-foliated metamorphic rocks are formed when rocks are heated but not deformed.
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