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Metamorphic rocks
- 3. - Metamorphic rocks can form from igneous, sedimentary or other metamorphic rocks.
- 5. - sometimes temperature and pressure are great enough to melt rock, forming magma.
- 6. - sometimes pressure flattens mineral grains in rocks without melting them.
- 7. - as pressure and temperature continue to increase over time, one type of rock can change into several different metamorphic rocks.
- 9. CLASSIFICATION: 1. Foliated texture: mineral grains flatten and line up in parallel layers or bands.