2. Metamorphic
rocks
Foliated Non-foliated
Metamorphism
Rocks undergo intense
heat and pressure.

3. Foliated (laminated)
slate schist gneiss
• usually black, slightly shiny • shiny • folded and irregular bands
• hard but can be separated
• folded layers • feldspar crystals
into thin layers
Non-foliated (crystalline)
marble quartzite
• many colours; often with veins • many colours; very hard
• reacts with acids, producing CO2 bubbles • no reaction with acids