Isochemical process by which rocks are changed by heat and

ROCKS

1. METAMORPHISM

2. What are the three types of rocks?

3. How do rocks change from one type to another?

4. METAMORPHISM It is from the Greek word “meta” means change and “morphe” means form. Metamorphism does not actually melt the rocks but transforms them into denser, more compact rocks. Mineral may also be rearranged due to chemical reactions involving fluids that enter rocks

5. EXAMPLES OF METAMORPHIC ROCKS Slate is used commercially for your classroom blackboards and for pool table tops.

6. EXAMPLES OF METAMORPHIC ROCKS Marble is used in the construction of building floors and bathroom walls and counter parts.

7. AGENTS OF METAMORPHISM PRESSURE TEMPERATURE CHEMICALLY ACTIVE FLUIDS

8. PRESSURE

9. PRESSURE IS APPLIED TO ROCKS IN THREE DIFFERENT WAYS PORE PRESSURE- the pressure applied by fluids trapped in sediments or grains of porous rocks. The presence of water speeds up reactions by acting as catalyst and increasing the rare of ion exchange.

10. PRESSURE IS APPLIED TO ROCKS IN THREE DIFFERENT WAYS 2. LOAD PRESSURE – the weight of overlying rocks that physically brings minerals into contact with each other over very long periods of time.

11. PRESSURE IS APPLIED TO ROCKS IN THREE DIFFERENT WAYS 3. TECTONIC PRESSURE – rocks undergo folding or faulting due to very high pressures exerted over relatively short periods of time.

12. TEMPERATURE

13. CHEMICALLY ACTIVE FLUIDS

14. FOLIATED – have a layer or banded appearance that is produced by exposure to head and direct pressure. NON-FOLIATED – have no evident of foliation; crystallized under conditions where there were no differential stress.

15. Metamorphic rocks Is formed at the surface of the Earth through the process of metamorphism with recrystallization of minerals in rocks due to changes in pressure and temperature conditions. Contact metamorphism B. Regional metamorphism Heat and Reactive fluids Pressure Main factors