Metamorphic Rocks

Metamorphic Rocks

1. Grades of Metamorphism

2. Type of Metamorphism

   • Dynamic - Pressre Only
     • e.g. Localized change around a fault zone
   • Contact - Heat Only
     • e.g. Localised change around a magma intrusion
   • Regional - Heat and Pressure
     • e.g. Extensive change in an area where tectonic places are colliding

3. Contact Metamorphism

4. Regional Metamorphism of Shale

5. Sources of Metamorphism

   • Pressure
     • Tectonic Movement
     • Weight of Rock (Lithostatic pressure)
   • Heat
     • Friction
     • Tectonic Pressure
     • Igenous Magma Bodies
     • Deep Mantle Sources

6. Foliation

   • Minerals align in the direction perpendicular to that of the applied force

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