GSC 101 Lecture Notes - Lecture 8: Metamorphic Facies, Metamorphism, Differential Stress
23 Feb 2018
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Document Summary
What are metamorphic rocks= rock that has been heated and pressurized. Key drivers of metamorphism recrystallization= pressure and shearing, temperature, fluids. Uniform vs. differential stress = uniform stress is the same in every direction and differential stress is different in different areas. Plastic deformation= if a rock is heated too much and becomes too ductile. Pressure solution foliation= differential stress that causes elongation. Neocrystallization= chemical reactions between different chemicals and minerals in a solution. Veins= when pore water is put under high pressure and expelled from rocks. Metastomism= chemical alteration of a rock by hydrothermal fluids. Metamorphic grade= when rocks are heated and make a high metamorphic one.
