1. Rocks The Geologic Dictionary

2. Rock Cycle Magma Igneous Rocks Sedimentary Rocks Metamorphic Rocks Sediment Crystallization Melting Metamorphism Lithification Weathering Erosion Transport Deposition

3. Metamorphic Rocks Rocks Under Stress

4. Metamorphism Recrystalization Solid-State Chemical Reactions No Melting

5. Parent Rock Composition Temperature Pressure Fluids Factors that affect Metamorphism

6. Parent Rock Composition Temperature Pressure Fluids Factors that affect Metamorphism

7. Parent Rock Composition Temperature Pressure Fluids Factors that affect Metamorphism Lithostatic pressure Directional Pressure

8. Directed Pressure Results in: Foliation

9. Foliation Under a Microscope

10. Metamorphic Grade

11. Parent Rock Composition Temperature Pressure Fluids Factors that affect Metamorphism

12. Metamorphic Rocks - Identification

13. Rock Identification is based on: Composition What minerals make up the rock? Texture What is the shape, size and orientation of the mineral grains that make up the rock?

14. Metamorphic Textures (All Crystalline) Foliated Nonfoliated

15. Foliation

16. Composition - Index Minerals

18. Mineral Composition - Geothermometers Rock Forms: 500-550°C Staurolite - Forms 500-750°C Garnet - Forms 450-700°C Muscovite - Forms 300-550°C

19. Foliated Metamorphic Rocks Parent Rock - Shale Slate (Low Grade) Schist (Medium Grade)

20. Foliated Rocks (cont.) Felsic Parent Rock Gneiss (High Grade) Migmatite (Very High Grade)

21. NonFoliated Rocks Parent Rock Limestone Marble (Low to High Grade)

22. Nonfoliated Rocks (cont.) Quartzite Metacoglomerate Parent Rocks Sandstone Conglomerate

23. Metamorphic Rocks - Interpretation

24. Metamorphic Environments = Metamorphic Facies

27. Metamorphic Rock “Translations” Chemical Composition Mineral Composition Foliation Parent Rock (Protolith) T & P of Formation (Depth / Facies)